Provided by: feh_3.2.1-1_amd64 bug

NAME

     feh — image viewer and cataloguer

SYNOPSIS

     feh [options] [files | directories | URLs ...]

VERSION

     This manual documents feh 3.2.1

     Compile-time switches in this build:
     ·   remote file support: libcurl enabled
     ·   natural sorting option available
     ·   Xinerama multi-monitor support enabled
     ·   builtin EXIF reader available
     ·   inotify-based auto-reload of changed files disabled

DESCRIPTION

     feh is a light-weight, configurable and versatile image viewer.  It is aimed at command line
     users, but can also be started from graphical file managers.  Apart from viewing images, it
     can compile text and thumbnail listings, show (un)loadable files, set X11 backgrounds, and
     more.

     Features include filelists, various image sorting modes, custom action scripts, and image
     captions.  feh can be controlled by configurable keyboard and mouse shortcuts, terminal
     input and signals.  When no file arguments or filelists are specified and --start-at is not
     used, feh displays all files in the current directory.

     EXIF tags are supported either using exiv2 / exifgrep via --info (see the USAGE EXAMPLES
     section), or as a builtin feature by compiling feh with exif=1. In this build of feh,
     builtin EXIF support is available.

MODES

     feh is based on various modes, which are selected at startup by command line options.

     Slideshow mode is the default.  It opens a window and displays the first image in it; the
     slideshow position can be advanced (or otherwise changed) using keyboard and mouse
     shortcuts.  In slideshow mode, images can be deleted either from the filelist or from the
     disk, a changed filelist can also be saved to the disk and reopened at a later time.  An
     image can also be read from stdin via "feh -".

     Montage mode forms a montage from the filelist.  The resulting image can be viewed or saved,
     and its size can be limited by height, width or both.

     Index mode forms an index print from the filelist.  Image thumbnails are shown along with
     the filename, size and dimensions, printed using a truetype font of your choice.  The
     resulting image can be viewed or saved, and its size can be limited by height, width or
     both.

     Thumbnail mode is like index mode, but the mini-images are clickable and open the selected
     image in a new window.

     Multiwindow mode shows images in multiple windows, instead of as a slideshow in one window.
     Don't use with a large filelist ;)

     List mode doesn't display images.  Instead, it outputs an ls-style listing of the files in
     the filelist, including image info such as size, number of pixels, type, etc.  There is also
     a Customlist mode which prints image info in a custom format specified by a printf-like
     format string.

     feh can also list either all the loadable files in a filelist or all the unloadable files.
     This is useful for preening a directory.

SUPPORTED FORMATS

     feh can open any format supported by imlib2, most notably jpeg, png, pnm, tiff, and bmp.
     The gif format is also supported, but only for static images.  In case of animations, only
     the first frame will be shown.  If the convert binary (supplied by ImageMagick) is
     available, it also has limited support for many other file types, such as svg, xcf and otf.
     If dcraw is available, feh also supports RAW files provided by cameras and will display the
     embedded thumbnails.  Use --conversion-timeout timeout with a non-negative value to enable
     support for these formats.

OPTIONS

     -A, --action [flag][[title]]action
             Specify a shell command as an action to perform on the image.  In slideshow or
             multiwindow mode, the action will be run when the action_0 key is pressed, in list
             mode, it will be run for each file.  In loadable/unloadable mode, it will be run for
             each loadable/unloadable file, respectively.  In thumbnail mode, clicking on an
             image will cause the action to run instead of opening the image.

             If flag is ";", feh will reload the current image instead of switching to the next
             one (slideshow mode) or closing the window (multiwindow mode) after executing the
             action.  If [title] is specified (note the literal "[" and "]"), --draw-actions will
             display title instead of action in the action list.  Note that title must not start
             with a space.  If it does, the action is handled as if it did not have a title.
             This special case exists for backwards compatibility reasons and makes sure that
             actions like "[ -L %F ] && foo" still work.

             The action will be executed by /bin/sh.  Use format specifiers to refer to image
             info, see FORMAT SPECIFIERS for details.  Example usage: "feh -A "mv ~/images/%N"
             *".

     --action1 .. --action9 [flag][[title]]action
             Extra actions which can be set and triggered using the appropriate number key.

     --auto-reload
             (optional feature, disabled in this build) automatically reload image when the
             underlying file changes.  Note that auto-reload (if enabled in the build) is on by
             default.  This option is only useful to re-enable auto-reload after it has been
             disabled by a preceding --reload=0 option.

     --auto-rotate
             (optional feature, available in this build) Automatically rotate images based on
             EXIF data.  Does not alter the image files.

     -Z, --auto-zoom
             Zoom pictures to screen size in fullscreen / fixed geometry mode.

     -x, --borderless
             Create borderless windows.

     --cache-size size
             Set imlib2 in-memory cache to size MiB.  A higher cache size can significantly
             improve performance especially for small slide shows, however at the cost of
             increased memory consumption.  size must be between 0 and 2048 MiB and defaults to
             4.

     -P, --cache-thumbnails
             Enable thumbnail caching.  Thumbnails are saved in $XDG_CACHE_HOME/thumbnails, which
             defaults to ~/.cache/thumbnails.  Note that thumbnails are only cached if the
             configured thumbnail size does not exceed 256x256 pixels.

     -K, --caption-path path
             Path to directory containing image captions.  This turns on caption viewing, and if
             captions are found in path, which is relative to the directory of each image, they
             are overlayed on the displayed image.  E.g. with caption path "captions/", and
             viewing image "images/foo.jpg", the caption will be looked for in
             "images/captions/foo.jpg.txt".

     --conversion-timeout timeout
             feh can use ImageMagick to try converting unloadable files into a supported file
             format.  As this can take a long time, it is disabled by default.  Set timeout to a
             non-negative value to enable it.  A positive value specifies after how many seconds
             conversion attempts should be aborted, zero causes feh to try indefinitely.
             Negative values restore the default by disabling conversion altogether.

     -L, --customlist format
             Don't display images, print image info according to format instead.  See FORMAT
             SPECIFIERS.

     -G, --draw-actions
             Draw the defined actions and what they do at the top-left of the image.

     --draw-exif
             (optional feature, available in this build) display some EXIF information in the
             bottom left corner, similar to using --info with exiv2 / exifgrep .

     -d, --draw-filename
             Draw the file name at the top-left of the image.

     --draw-tinted
             Show overlay texts (as created by --draw-filename et al) on a semi-transparent
             background to improve their readability

     --edit  Enable basic editing of files.  This makes rotation and mirroring (bound to "<",
             ">", "|", and "_" by default) change the underlying file and not just its displayed
             content.

     -f, --filelist file
             This option is similar to the playlists used by music software.  If file exists, it
             will be read for a list of files to load, in the order they appear.  The format is a
             list of image file names, absolute or relative to the current directory, one file
             name per line.

             If file doesn't exist, it will be created from the internal filelist at the end of a
             viewing session.  This is best used to store the results of complex sorts (-Spixels
             for example) for later viewing.

             Any changes to the internal filelist (such as deleting a file or it being pruned for
             being unloadable) will be saved to file when feh exits.  You can add files to
             filelists by specifying them on the command line when also specifying the list.

             If file is "-", feh will read the filelist from its standard input.

     -e, --font font
             Set global font.  Should be a truetype font, resident in the current directory or
             the font directory, and should be defined in the form fontname/points, like
             "myfont/12".

     -C, --fontpath path
             Specify path as extra directory in which to search for fonts; can be used multiple
             times to add multiple paths.

     --force-aliasing
             Disable anti-aliasing for zooming, background setting etc.

     -I, --fullindex
             Same as index mode, but with additional information below the thumbnails.  Works
             just like "feh --index --index-info "%n\n%S\n%wx%h"".  Enables MONTAGE MODE OPTIONS.

             Note: This option needs to load all images to calculate the dimensions of the feh
             window, so when using it with many files it will take a while before a feh window is
             visible.  Use --preload to get a progress bar.

     -F, --fullscreen
             Make the window fullscreen.  Note that in this mode, large images will always be
             scaled down to fit the screen, and --zoom zoom only affects smaller images and never
             scales larger than necessary to fit the screen size.  The only exception is a zoom
             of 100, in which case images will always be shown at 100% zoom.

             When combined with --thumbnails, this option only affects images opened from the
             thumbnail overview.  The thumbnail list itself will still be windowed.

     -g, --geometry width x height | + x + y | width x height + x + y
             Use a fixed window size as specified in the X-style geometry string, e.g. 640x480.
             An optional +x+y window offset can be specified.  Combine with --scale-down to scale
             down larger images like in fullscreen mode.  Note that this option does not enforce
             the window size; changing it by a tiling WM or manually is still possible.  However,
             auto-resize remains disabled.

     -Y, --hide-pointer
             Hide the pointer (useful for slideshows).

     -B, --image-bg style
             Use style as background for transparent image parts and the like.  Accepted values:
             default, checks, or an XColor (e.g. "black" or "#428bdd").  In windowed mode, the
             default is checks (a checkered background so transparent image parts are easy to
             see).  In fullscreen and background setting mode, checks is not accepted and the
             default is black.

     -i, --index
             Enable Index mode.  Index mode is similar to montage mode, and accepts the same
             options.  It creates an index print of thumbnails, printing the image name beneath
             each thumbnail.  Index mode enables certain other options, see INDEX AND THUMBNAIL
             MODE OPTIONS and MONTAGE MODE OPTIONS.

     --info [flag]command_line
             Execute command_line and display its output in the bottom left corner of the image.
             Can be used to display e.g. image dimensions or EXIF information.  Supports FORMAT
             SPECIFIERS.  If flag is set to ";", the output will not be displayed by default, but
             has to be enabled by the toggle_info key.

     --insecure
             When viewing files with HTTPS, this option disables all certificate checks.  It
             allows images on sites with self-signed or expired certificates to be opened, but is
             no more secure than plain HTTP.

     -k, --keep-http
             When viewing files using HTTP, feh normally deletes the local copies after viewing,
             or, if caching, on exit.  This option permanently stores them on disk, either in the
             directory specified by --output-dir, or in the current working directory.

     --keep-zoom-vp
             When switching images, keep zoom and viewport settings (zoom level and X, Y offsets)

     -l, --list
             Don't display images.  Analyze them and display an ls(1) - style listing.  Useful in
             scripts to hunt out images of a certain size/resolution/type etc.

     -U, --loadable
             Don't display images.  Just print out their names if imlib2 can successfully load
             them.  Returns false if at least one image failed to load.

     --max-dimension width x height
             Only show images with width <= width and height <= height.  If you only care about
             one parameter, set the other to 0 (or a negative value).

     -M, --menu-font font
             Use font (truetype, with size, like "yudit/12") as menu font.

     --min-dimension width x height
             Only show images with width >= width and height >= height.  If you only care about
             one parameter, set the other to 0.

     -m, --montage
             Enable montage mode.  Montage mode creates a new image consisting of a grid of
             thumbnails of the images in the filelist.  When montage mode is selected, certain
             other options become available.  See MONTAGE MODE OPTIONS.

     -w, --multiwindow
             Disable slideshow mode.  With this setting, instead of opening multiple files in
             slideshow mode, multiple windows will be opened; one per file.

     --no-jump-on-resort
             Don't jump to the first image after resorting the filelist.

     -N, --no-menus
             Don't load or show any menus.

     --no-screen-clip
             By default, window sizes are limited to the screen size.  With this option, windows
             will have the size of the image inside them.  Note that they may become very large
             this way, making them unmanageable in certain window managers.

     --no-xinerama
             (optional feature, enabled in this build) Disable Xinerama support.

     --on-last-slide hold | quit | resume
             Select behaviour when trying to select the next image on the last slide (or the
             previous image on the first slide) in a slide show.

             With hold, feh will stop advancing images in this case and continue displaying the
             first/last image, respectively.  This is intended for linear slide shows.  Behaviour
             is unspecified when using other navigation commands than previous and next image.

             quit will cause feh to quit when trying to advance past the last image in the slide
             show.

             resume is the default behaviour: On the last (first) image, feh will wrap around to
             the first (last) image.

     -j, --output-dir directory
             Save files to directory when using --keep-http or the save_image command.  By
             default, files are saved in the current working directory.

     -p, --preload
             Preload images.  This doesn't mean hold them in RAM, it means run through them and
             eliminate unloadable images first.  Otherwise they will be removed as you flick
             through.  This also analyses the images to get data for use in sorting, such as
             pixel size, type etc.  A preload run will be automatically performed if you specify
             one of these sort modes.

     -q, --quiet
             Don't report non-fatal errors for failed loads.  Verbose and quiet modes are not
             mutually exclusive, the first controls informational messages, the second only
             errors.

     -z, --randomize
             When viewing multiple files in a slideshow, randomize the file list before
             displaying.  The list is re-randomized whenever the slideshow cycles (that is,
             transitions from last to first image).

     -r, --recursive
             Recursively expand any directories in the command line arguments to the content of
             those directories, all the way down to the bottom level.

     --no-recursive
             Don't recursively expand any directories.  This is the default, but this option is
             useful to override themes containing --recursive.

     -R, --reload int
             Reload filelist and current image after int seconds.  Useful for viewing HTTP
             webcams or frequently changing directories.  (Note that filelist reloading is still
             experimental.) Set to zero to disable any kind of automatic reloading.

             If an image is removed, feh will either show the next one or quit.  However, if an
             image still exists, but can no longer be loaded, feh will continue to try loading
             it.

             Setting this option causes inotify-based auto-reload to be disabled.

     -n, --reverse
             Reverse the sort order.  Use this to invert the order of the filelist.  E.g. to sort
             in reverse width order, use -nSwidth.

     -., --scale-down
             Scale images to fit window geometry (defaults to screen size when no geometry was
             specified).  Note that the window geometry is not updated when changing images at
             the moment.  This option is recommended for tiling window managers.  This option is
             ignored when in fullscreen and thumbnail list mode.

             In tiling environments, this also causes the image to be centered in the window.

     --scroll-step count
             Scroll count pixels whenever scroll_up, scroll_down, scroll_left or scroll_right is
             pressed.  Note that this option accepts negative numbers in case you need to reverse
             the scroll direction.  See KEYS CONFIG SYNTAX for how to reverse it permanently.
             Default: 20

     -D, --slideshow-delay float
             For slideshow mode, wait float seconds between automatically changing slides.
             Useful for presentations.  Specify a negative number to set the delay (which will
             then be float * (-1)), but start feh in paused mode.

     -S, --sort sort_type
             Sort file list according to image parameters.  Allowed sort types are: name,
             filename, dirname, mtime, width, height, pixels, size, format.  For sort modes other
             than name, filename, dirname, or mtime, a preload run is necessary, causing a delay
             proportional to the number of images in the list.

             mtime starts with the most recently modified image.  width, height, pixels and size
             start with the smallest.  Use --reverse to sort by oldest or largest first.

             For name, filename, and dirname you can use --version-sort to sort numbers
             naturally, so that e.g. 10.jpg comes after 2.jpg.

     -|, --start-at filename
             Start the filelist at filename.  If no other files or filelists were specified on
             the command line, feh will first load all files from the directory in which filename
             resides.  This way, it's possible to look at a specific image and use the next /
             prev keys to browse through the directory.  See USAGE EXAMPLES for examples.

             Note: If you use relative paths in your filelist, filename should also be a relative
             path.  If you use absolute paths, it should also be an absolute path.  If feh cannot
             find an exact match, it will compare basenames (filenames without the directory
             suffix).  This may lead to mismatches if several files in your filelist have the
             same basename.

     -T, --theme theme
             Load options from config file with name theme - see THEMES CONFIG SYNTAX for more
             info.  Note that command line options always override theme options.  The theme can
             also be set via the program name (e.g. with symlinks), so by default feh will look
             for a "feh" theme.

     -t, --thumbnails
             Same as Index mode, but the thumbnails are clickable image launchers.  Note that
             --fullscreen and --scale-down do not affect the thumbnail window.  They do, however,
             work for image windows launched from thumbnail mode.  Also supports INDEX AND
             THUMBNAIL MODE OPTIONS as well as MONTAGE MODE OPTIONS.

     -~, --thumb-title string
             Set title for windows opened from thumbnail mode.  See also FORMAT SPECIFIERS.

     -^, --title title
             Set window title.  Applies to all windows except those opened from thumbnail mode.
             See FORMAT SPECIFIERS.

     -u, --unloadable
             Don't display images.  Just print out their names if imlib2 can NOT successfully
             load them.  Returns false if at least one image was loadable.

     -V, --verbose
             output useful information, progress bars, etc.

     -v, --version
             output version information and exit.

     --version-sort
             (optional feature, available in this build) When combined with --sort name, --sort
             filename, or --sort dirname: use natural sorting for file and directory names.  In
             this mode, filenames are sorted as an ordinary human would expect, e.g.  "2.jpg"
             comes before "10.jpg".  Note that this option only has an effect when a sort mode is
             set using --sort.

     --xinerama-index screen
             (optional feature, enabled in this build) Override feh's idea of the active Xinerama
             screen.  May be useful in certain circumstances where the window manager places the
             feh window on Xinerama screen A while feh assumes that it will be placed on screen
             B.

             In background setting mode: When used with any option other than --bg-tile: Only set
             wallpaper on screen.  All other screens will be filled black/white.  This is most
             useful in a Xinerama configuration with overlapping screens.  For instance, assume
             you have two overlapping displays (index 0 and 1), where index 0 is smaller.  To
             center a background on the display with index 0 and fill the extra space on index 1
             black/white, use "--xinerama-index 0" when setting the wallpaper.

     --zoom percent | max | fill
             Zoom images by percent when in full screen mode or when window geometry is fixed.
             When combined with --auto-zoom, zooming will be limited to the specified percent.
             Specifying max is like setting --auto-zoom, using fill makes feh zoom the image like
             the --bg-fill mode.

MONTAGE MODE OPTIONS

     These additional options can be used for index, montage and (partially) thumbnail mode.

     -a, --alpha int
             When drawing thumbnails onto the background, set their transparency level to int (0
             - 255).

     -b, --bg file | trans
             Use file as background for your montage.  With this option specified, the montage
             size will default to the size of file if no size restrictions were specified.
             Alternatively, if file is "trans", the background will be made transparent.

     -X, --ignore-aspect
             By default, the montage thumbnails will retain their aspect ratios, while fitting
             into thumb-width/-height.  This options forces them to be the size set by
             --thumb-width and --thumb-height.  This will prevent any empty space in the final
             montage.

     -H, --limit-height pixels
             Limit the height of the montage.

     -W, --limit-width pixels
             Limit the width of the montage, defaults to 800 pixels.

             If both --limit-width and --limit-height are specified, the montage will be exactly
             width x height pixels in dimensions.

     -o, --output file
             Save the created montage to file.

     -O, --output-only file
             Just save the created montage to file without displaying it.

     -s, --stretch
             Normally, if an image is smaller than the specified thumbnail size, it will not be
             enlarged.  If this option is set, the image will be scaled up to fit the thumbnail
             size.  Aspect ratio will be maintained unless --ignore-aspect is specified.

     -E, --thumb-height pixels
             Set thumbnail height.

     -y, --thumb-width pixels
             Set thumbnail width.

INDEX AND THUMBNAIL MODE OPTIONS

     In addition to MONTAGE MODE OPTIONS --alpha, --bg, --limit-height, --limit-width, --output,
     --output-only, --thumb-height, --thumb-width, the following options can be used.

     --index-info format
             Show image information based on format below thumbnails in index / thumbnail mode.
             See FORMAT SPECIFIERS.  May contain newlines.  Use "--index-info ''" to display
             thumbnails without any info text

             Note: If you specify image-related formats (such as %w or %s), feh needs to load all
             images to calculate the dimensions of its own window.  So when using them with many
             files, it will take a while before a feh window becomes visible.  Use --preload to
             get a progress bar.

     -@, --title-font font
             Set font to print a title on the index, if no font is specified, no title will be
             printed.

     -J, --thumb-redraw n
             Redraw thumbnail window every n images while generating thumbnails.  Redrawing takes
             quite long, so the default is 10.  Set n = 1 to update the thumbnail window
             immediately.  With n = 0, there will only be one redraw once all thumbnails are
             loaded.

BACKGROUND SETTING

     In many desktop environments, feh can also be used as a background setter.  Unless you pass
     the --no-fehbg option, it will write a script to set the current background to ~/.fehbg.  So
     to have your background restored every time you start X, you can add "~/.fehbg &" to your X
     startup script (such as ~/.xinitrc).  Note that the commandline written to ~/.fehbg always
     includes the --no-fehbg option to ensure that it is not inadvertently changed by differences
     in X11 screen layout or similar.

     Note that feh does not support setting the wallpaper of GNOME shell desktops.  In this
     environment, you can use "gsettings set org.gnome.desktop.background picture-uri
     file:///path" instead.

     For --bg-center, --bg-fill, and --bg-max, you can use --geometry to specify an offset from
     one side of the screen instead of centering the image.  Positive values will offset from the
     left/top side, negative values from the bottom/right.  +0 and -0 are both valid and distinct
     values.

     Note that all options except --bg-tile support Xinerama.  For instance, if you have multiple
     screens connected and use e.g.  --bg-center, feh will center or appropriately offset the
     image on each screen.  You may even specify more than one file, in that case, the first file
     is set on screen 0, the second on screen 1, and so on.

     Use --no-xinerama to treat the whole X display as one screen when setting wallpapers.  You
     may also use --xinerama-index to use feh as a background setter for a specific screen.

     --bg-center
             Center the file on the background.  If it is too small, it will be surrounded by a
             border as specified by --image-bg.

     --bg-fill
             Like --bg-scale, but preserves aspect ratio by zooming the image until it fits.
             Either a horizontal or a vertical part of the image will be cut off

     --bg-max
             Like --bg-fill, but scale the image to the maximum size that fits the screen with
             borders on one side.  The border color can be set using --image-bg.

     --bg-scale
             Fit the file into the background without repeating it, cutting off stuff or using
             borders.  But the aspect ratio is not preserved either

     --bg-tile
             Tile (repeat) the image in case it is too small for the screen

     --no-fehbg
             Do not write a ~/.fehbg file

FORMAT SPECIFIERS

     %f      Image path/filename

     %F      Escaped image path/filename (for use in shell commands)

     %g      w,h window dimensions in pixels (mnemonic: geometry)

     %h      Image height

     %l      Total number of files in filelist

     %L      Temporary copy of filelist.  Multiple uses of %L within the same format string will
             return the same copy.

     %m      Current mode

     %n      Image name

     %N      Escaped image name

     %o      x,y offset of top-left image corner to window corner in pixels

     %p      Number of image pixels

     %P      Number of image pixels in human-readable format with k/M (kilopixels / megapixels)
             suffix

     %r      Image rotation.  A half right turn equals pi.

     %s      Image size in bytes

     %S      Human-readable image size (kB / MB)

     %t      Image format

     %u      Number of current file

     %w      Image width

     %v      feh version

     %V      Process ID

     %z      Current image zoom, rounded to two decimal places

     %Z      Current image zoom, higher precision

     %%      A literal %

CONFIGURATION

     feh has three config files: themes for theme definitions, keys for key bindings and buttons
     for mouse button bindings.  It will try to read them from $XDG_CONFIG_HOME/feh/, which (when
     XDG_CONFIG_HOME is unset) defaults to ~/.config/feh/.  If the files are not found in that
     directory, it will also try /etc/feh/.

     All config files treat lines starting with a "#" character as comments.  Comments at the end
     of a line are not supported.

THEMES CONFIG SYNTAX

     .config/feh/themes allows the naming of option groups, called themes.

     It takes entries of the form "theme options ...", where theme is the name of the entry and
     options are the options which will be applied when the theme is used.

     Note that the option parser does not behave like a normal shell: filename expansion and
     backslash escape sequences are not supported and passed to feh's option parser as-is.
     However, quoting of arguments is respected and can be used for arguments with whitespace.
     So, the sequence "--info "foo bar"" works as intended (that is, it display the string "foo
     bar"), whereas the option string "--info foo\ bar" will only display "foo\" and complain
     about the file bar not existing.  Please keep this in mind when writing theme files.

     An example entry is "imagemap -rVq --thumb-width 40 --thumb-height 30 --index-info
     '%n\n%wx%h'".

     You can use this theme in two ways.  Either call "feh -Timagemap *.jpg", or create a
     symbolic link to feh with the name of the theme you want it to use.  For the example above,
     this would be "ln -s `which feh ` ~/bin/imagemap".  Now just run "imagemap *.jpg" to use
     these options.

     Note that you can split a theme over several lines by placing a backslash at the end of an
     unfinished line.  A single option-argument-pair must not span multiple lines.  A single line
     must not be longer than 1023 characters, but there's no upper limit for the length of a
     theme.

     Command line options always override theme options.

KEYS CONFIG SYNTAX

     .config/feh/keys defines key bindings.  It has entries of the form "action [key1 [key2
     [key3]]]".

     Each key is an X11 keysym name as shown by xev(1), like "Delete".  It may optionally start
     with modifiers for things like Control, in which case key looks like mod-keysym (for example
     "C-Delete" for Ctrl+Delete or "C-1-Delete" for Ctrl+Alt+Delete)

     Available modifiers are C for Control, S for Shift and 1, 4 for Mod1 and Mod4.  To match an
     uppercase letter like "S" instead of "s", the Shift modifier is not required.

     Specifying an action without any keys unbinds it (i.e. the default bindings are removed).

     Note: Do not use the same keybinding for multiple actions.  When binding an action to a new
     key (or mouse button), make sure to unbind it from its previous action, if present.  feh
     does not check for conflicting bindings, so their behaviour is undefined.

     For a list of the action names, see KEYS.  Note that not all of the key names used there
     correspond to X11 keysyms.  Most notably, page up (Prior / Page_Up), page down (Next /
     Page_Down) and the keypad keys (KP_*) do not.

KEYS

     The following actions and default key bindings can be used in an image window.  (The strings
     in [square brackets] are the config action names).  If feh is running inside a terminal and
     its standard input is not used for images or filelists, key input from the terminal is also
     accepted.  However, terminal input support is currently limited to most alphanumeric
     characters (0-9 a-z A-Z and some more), arrow keys, return and backspace.  The Alt (Mod1)
     modifier is also supported.

     a [toggle_actions]
             Toggle actions display (see --draw-actions)

     A [toggle_aliasing]
             Enable/Disable anti-aliasing

     c [toggle_caption]
             Caption entry mode.  If --caption-path has been specified, then this enables caption
             editing.  The caption at the bottom of the screen will turn yellow and can be
             edited.  Hit return to confirm and save the caption, or escape to cancel editing.
             Note that you can insert an actual newline into the caption using ⟨Ctrl+return⟩.

     d [toggle_filenames]
             Toggle filename display (see --draw-filename)

     e [toggle_exif]
             (optional feature, available in this build) Toggle EXIF tag display

     f [toggle_fullscreen]
             Toggle fullscreen

     g [toggle_fixed_geometry]
             Enable/Disable automatic window resize when changing images.

     h [toggle_pause]
             Pause/Continue the slideshow.  When it is paused, it will not automatically change
             slides based on --slideshow-delay.

     i [toggle_info]
             Toggle info display (see --info)

     k [toggle_keep_vp]
             Toggle zoom and viewport keeping.  When enabled, feh will keep zoom and X, Y offset
             when switching images.

     L [save_filelist]
             Save the current filelist as "feh_PID_ID_filelist"

     m [toggle_menu]
             Show menu.  Use the arrow keys and return to select items, and ⟨escape⟩ to close the
             menu.

     n, ⟨space⟩, ⟨Right⟩ [next_img]
             Show next image.  Selects the next image in thumbnail mode.

     o [toggle_pointer]
             Toggle pointer visibility

     p, ⟨BackSpace⟩, ⟨Left⟩ [prev_img]
             Show previous image.  Selects the previous image in thumbnail mode.

     q, ⟨Escape⟩ [quit]
             Quit feh

     r [reload_image]
             Reload current image.  Useful for webcams

     s [save_image]
             Save the current image as "feh_PID_ID_FILENAME"

     w [size_to_image]
             Change window size to fit current image size (plus/minus zoom, if set).  In scale-
             down and fixed-geometry mode, this also updates the window size limits.

     x [close]
             Close current window

     z [jump_random]
             Jump to a random position in the current filelist

     Z [toggle_auto_zoom]
             Toggle auto-zoom.

     [, ] [prev_dir, next_dir]
             Jump to the first image of the previous or next sequence of images sharing a
             directory name in the current filelist.  Use --sort dirname if you would like to
             ensure that all images in a directory are grouped together.

     <, > [orient_3, orient_1]
             rotate the image 90 degrees (counter)clockwise.

             When --edit is used, this also rotates the image in the underlying file.  Rotation
             is lossless, but may create artifacts in some image corners when used with JPEG
             images.  Rotating in the reverse direction will make them go away.  See jpegtran(1)
             for more about lossless JPEG rotation.  Note: feh assumes that this feature is used
             to normalize image orientation.  For JPEG images, it will unconditionally set the
             EXIF orientation tag to 1 ("0,0 is top left") after every rotation.  See
             jpegexiforient(1) for details on how to change this flag.

     _ [flip]
             Vertically flip image.  When --edit is used, this also flips the image in the
             underlying file (see above).

     | [mirror]
             Horizontally flip image.  When --edit is used, this also flips the image in the
             underlying file (see above).

     0 .. 9 [action_0 .. action_9]
             Execute the corresponding action (0 = --action, 1 = --action1 etc.)

     ⟨Return⟩ [action_0]
             Run the command defined by --action

     ⟨Home⟩ [jump_first]
             Show first image

     ⟨End⟩ [jump_last]
             Show last image

     ⟨page up⟩ [jump_fwd]
             Go forward ~5% of the filelist

     ⟨page down⟩ [jump_back]
             Go backward ~5% of the filelist

     + [reload_plus]
             Increase reload delay by 1 second

     - [reload_minus]
             Decrease reload delay by 1 second

     ⟨Delete⟩ [remove]
             Remove current file from filelist

     ⟨Ctrl+Delete⟩ [delete]
             Remove current file from filelist and delete it

     ⟨keypad Left⟩, ⟨Ctrl+Left⟩ [scroll_left]
             Scroll to the left

     ⟨keypad Right⟩, ⟨Ctrl+Right⟩ [scroll_right]
             Scroll to the right

     ⟨keypad up⟩, ⟨Ctrl+Up⟩ [scroll_up]
             Scroll up

     ⟨keypad Down⟩, ⟨Ctrl+Down⟩ [scroll_down]
             Scroll down.  Note that the scroll keys work without anti-aliasing for performance
             reasons; hit the render key after scrolling to anti-alias the image.

     ⟨Alt+Left [scroll_left_page]⟩
             Scroll to the left by one page

     ⟨Alt+Right [scroll_right_page]⟩
             Scroll to the right by one page

     ⟨Alt+Up [scroll_up_page]⟩
             Scroll up by one page

     ⟨Alt+Down [scroll_down_page]⟩
             Scroll down by one page

     R, ⟨keypad begin⟩ [render]
             Anti-alias the image.  Opens the currently selected image in thumbnail mode.

     ⟨keypad +⟩, ⟨Up⟩ [zoom_in]
             Zoom in

     ⟨keypad -⟩, ⟨Down⟩ [zoom_out]
             Zoom out

     *, ⟨keypad *⟩ [zoom_default]
             Zoom to 100%

     /, ⟨keypad /⟩ [zoom_fit]
             Zoom to fit the window size

     ! [zoom_fill]
             Zoom to fill the window size like --bg-fill

   MENU KEYS
     The following keys bindings are used for the feh menu:

     ⟨Escape⟩ [menu_close]
             Close the menu

     ⟨Up⟩ [menu_up]
             Highlight previous menu item

     ⟨Down⟩ [menu_down]
             Highlight next menu item

     ⟨Left⟩ [menu_parent]
             Highlight parent menu item

     ⟨Right⟩ [menu_child]
             Highlight child menu item

     ⟨Return⟩, ⟨space⟩ [menu_select]
             Select highlighted menu item

BUTTONS CONFIG SYNTAX

     .config/feh/buttons.  This works like the keys config file: the entries are of the form
     "action [binding]".

     Each binding is a button number.  It may optionally start with modifiers for things like
     Control, in which case binding looks like mod-button (for example C-1 for Ctrl + Left
     button).

     Note: Do not use the same button for multiple actions.  feh does not check for conflicting
     bindings, so their behaviour is undefined.  Either unbind the unwanted action, or bind it to
     another unused button.  The order in which you bind / unbind does not matter, though.

     For the available modifiers, see KEYS CONFIGURATION SYNTAX.

   BUTTONS
     In an image window, the following buttons may be used (The strings in [square brackets] are
     the config action names).  Additionally, all actions specified in the KEYS section can also
     be bound to a button.

     unbound [reload]
             Reload current image

     1 ⟨left mouse button⟩ [pan]
             pan the current image

     2 ⟨middle mouse button⟩ [zoom]
             Zoom the current image

     3 ⟨right mouse button⟩ [toggle_menu]
             Toggle menu

     4 ⟨mousewheel down⟩ [prev_img]
             Show previous image

     5 ⟨mousewheel up⟩ [next_img]
             Show next image

     Ctrl+1 [blur]
             Blur current image

     Ctrl+2 [rotate]
             Rotate current image

     unbound [zoom_in]
             Zoom in

     unbound [zoom_out]
             Zoom out

MOUSE ACTIONS

     Default Bindings: When viewing an image, mouse button 1 pans the image (moves it around) or,
     when only clicked, moves to the next image (slideshow mode only).  Quick drags with less
     than 2px of movement per axis will be treated as clicks to aid graphics tablet users.  Mouse
     button 2 zooms (click and drag left->right to zoom in, right->left to zoom out, click once
     to restore zoom to 100%) and mouse button 3 opens the menu.

     Ctrl+Button 1 blurs or sharpens the image (drag left to blur, right to sharpen); Ctrl+Button
     2 rotates the image around the center point.

     A note about pan and zoom modes: In pan mode, if you reach a window border but haven't yet
     panned to the end of the image, feh will warp your cursor to the opposite border so you can
     continue panning.

     When clicking the zoom button and immediately releasing it, the image will be back at 100%
     zoom.  When clicking it and moving the mouse while holding the button down, the zoom will be
     continued at the previous zoom level.  The zoom will always happen so that the pixel on
     which you entered the zoom mode remains stationary.  So, to enlarge a specific part of an
     image, click the zoom button on that part.

SIGNALS

     In slideshow and multiwindow mode, feh handles the following signals:

     SIGUSR1
             Slideshow mode: switch to next image; reload current image if the slideshow consists
             of a single file.  Multiwindow mode: reload all images.

     SIGUSR2
             Slideshow mode: switch to previous image; reload current image if the slideshow
             consists of a single file.  Multiwindow mode: reload all images.

USAGE EXAMPLES

     Here are some examples of useful option combinations.  See also:
     ⟨https://feh.finalrewind.org/examples/⟩

     feh ~/Pictures
             Show all images in ~/Pictures

     feh -r ~/Pictures
             Recursively show all images found in ~/Pictures and subdirectories

     feh -rSfilename --version-sort ~/Pictures
             Same as above, but sort naturally.  By default, feh will show files in the string
             order of their names, meaning e.g.  "foo 10.jpg" will come before "foo 2.jpg".  In
             this case, they are instead ordered as a human would expect.

     feh -t -Sfilename -E 128 -y 128 -W 1024 ~/Pictures
             Show 128x128 pixel thumbnails, limit window width to 1024 pixels.

     feh -t -Sfilename -E 128 -y 128 -W 1024 -P -C /usr/share/fonts/truetype/ttf-dejavu/ -e
             DejaVuSans/8 ~/Pictures
             Same as above, but enable thumbnail caching and use a smaller font.

     feh -irFarial/14 -O index.jpg ~/Pictures
             Make an index print of ~/Pictures and all directories below it, using 14 point Arial
             to write the image info under each thumbnail.  Save the image as index.jpg and don't
             display it, just exit.  Note that this even works without a running X server

     feh --unloadable -r ~/Pictures
             Print all unloadable images in ~/Pictures, recursively

     feh -f by_width -S width --reverse --list .
             Write a list of all images in the directory to by_width, sorted by width (widest
             images first)

     feh -w ~/Pictures/holidays
             Open each image in ~/Pictures/holidays in its own window

     feh -FD5 -Sname ~/Pictures/presentation
             Show the images in .../presentation, sorted by name, in fullscreen, automatically
             change to the next image after 5 seconds

     feh -rSwidth -A "mv %F ~/images/%N" ~/Pictures
             View all images in ~/Pictures and below, sorted by width, move an image to
             ~/image/image_name when enter is pressed

     feh --start-at ~/Pictures/foo.jpg
             View all images in ~/Pictures, starting with foo.jpg.  All other images are still in
             the slideshow and can be viewed normally

     feh --start-at ~/Pictures/foo.jpg ~/Pictures
             Same as above.

     feh --info "exifgrep '(Model|DateTimeOriginal|FNumber|ISO|Flash)' %F | cut -d . -f 4-" .
             Show some EXIF information, extracted by exifprobe/exifgrep

     feh --action 'rm %F' -rl --max-dimension 1000x800
             Recursively remove all images with dimensions below or equal to 1000x800 pixels from
             the current directory.

     feh -L '%w %h %f' | awk '{ if ($1 > $2) { print $0 } }' | cut -d ' ' -f 3- | feh -f -
             Show landscape pictures (image width greater than height) in the current directory.

DEPENDENCIES

     When --edit is used, feh needs the jpegtran and jpegexiforient binaries (usually distributed
     in "libjpeg-progs" or similar) for lossless JPEG rotation.

     To view images from URLs such as "http://", feh must be compiled with libcurl support.  It
     is enabled in this build

KNOWN BUGS

     On systems with giflib 5.1.2, feh may be unable to load gif images.  For affected mips,
     mipsel and arm devices, gif support is completely broken, while on x86 / x86_64 gifs can
     usually only be loaded if they are the first image in the filelist.  This appears to be a
     bug in giflib, see ⟨https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813729⟩ for details.
     Workaround: Use --conversion-timeout 5 (or some other positive value) to load gifs with
     imagemagick instead, or downgrade to giflib 5.1.1, or upgrade to giflib 5.1.4.

     While loading images using libcurl, feh will not react to key or mouse actions.

     Thumbnail mode is somewhat inefficient, and because of that not nearly as fast as it could
     be.

     --scale-down does not take window decorations into account and may therefore make the window
     slightly too large.

   REPORTING BUGS
     If you find a bug, please report it to ⟨derf+feh@finalrewind.org⟩ or via
     ⟨https://github.com/derf/feh/issues⟩.  You are also welcome to direct any feh-related
     comments/questions/... to #feh on irc.oftc.net.

     Please include the feh version ⟨the output of "feh --version"⟩, steps to reproduce the bug
     and, if necessary, images to reproduce it.

FUTURE PLANS

     Plans for the following releases:
     ·   Make zoom options more intuitive

LICENSE

     Copyright (C) 1999, 2000 by Paul Duncan.  Copyright (C) 1999, 2000 by Tom Gilbert (and
     various contributors).  Copyright (C) 2010-2018 by Daniel Friesel (and even more
     contributors).

     Permission is hereby granted, free of charge, to any person obtaining a copy of this
     software and associated documentation files (the "Software"), to deal in the Software
     without restriction, including without limitation the rights to use, copy, modify, merge,
     publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
     to whom the Software is furnished to do so, subject to the following conditions:

     The above copyright notice and this permission notice shall be included in all copies of the
     Software and its documentation and acknowledgment shall be given in the documentation and
     software packages that this Software was used.

     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
     PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES
     OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
     OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

     Current developer: Daniel Friesel ⟨derf@finalrewind.org⟩

     Original author (no longer developing): Tom Gilbert ⟨feh_sucks@linuxbrit.co.uk⟩

     See also: https://feh.finalrewind.org