NAME

        icewmbg - a background settings manager for the IceWM window manager

SYNOPSIS

       icewmbg [OPTIONS]

DESCRIPTION

       icewmbg can assign a colour or image to the X11 desktop background.  Many image formats
       are supported.  Each icewm(1) work space can have its own background.

       When the background image has changed, then icewmbg can be notified to update the
       background.  When switching work spaces, it checks the image file modification time.  If
       the file has changed, then it reloads the background image from file.

       icewmbg supports semi-transparency.  Semitransparent background images and colours can be
       configured.  If these are not specified then the default background is used.

       It uses RandR or Xinerama to support backgrounds on all connected monitors.  When monitors
       appear/disappear, or change their resolution, icewmbg will adjust.  It supports an option
       for one large background over all monitors.

       It will update the "_ICEWMBG_IMAGE" property of the root window to the path of the
       background image whenever it changes the desktop background.

       icewmbg is started automatically by icewm-session(1).

OPTIONS

   SPECIFIC OPTIONS
       Where multiple values can be given for images or colours, they are separated by commas.
       Each such value may be enclosed in double quotes.  When FILE is a directory then all
       images from that directory are used in sorted order.  If the value starts with an
       exclamation mark, as in !FILE, then the images from the directory FILE are permuted
       randomly.  Image file names or directory names may have wildcards, which will be expanded
       according to glob(7).

       -p, --replace
           Replace an existing icewmbg. If there is a running icewmbg, it is instructed to quit.
           The new icewmbg will take over.

       -q, --quit
           Tell the running icewmbg to quit. This option is used by icewm-session(1) when
           icewm(1) exits.

       -r, --restart
           Tell the running icewmbg to restart itself.  This is useful when a background file or
           directory has changed, or when settings in preferences files have changed.

       -u, --shuffle
           Shuffle the list of background images randomly.  This option may be given again
           whenever the running icewmbg should reshuffle its list of background images.

       -c, --config=FILE
           Load preferences from FILE.

       -t, --theme=THEME
           Load the theme named THEME.

       -i, --image=FILE[,FILE]*
           Load background images from each FILE.  This overrules the "DesktopBackgroundImage"
           preference.

       -k, --color=COLOR[,COLOR]*
           Use background colours from each COLOR.  This overrules the "DesktopBackgroundColor"
           preference.

       -s, --semis=FILE[,FILE]*
           Load transparency images from each FILE.  This overrules the
           "DesktopTransparencyImage" preference.

       -x, --trans=NAME[,NAME]
           Use transparency colours for each NAME.  This overrules the "DesktopTransparencyColor"
           preference.

       -e, --center={0|1}
           Disable/Enable centring background.  This overrules the "DesktopBackgroundCenter"
           preference.

       -a, --scaled={0|1}
           Disable/Enable scaling background.  This overrules the "DesktopBackgroundScaled"
           preference.

       -m, --multi={0|1}
           Disable or enable a single background over all monitors.  This overrules the
           "DesktopBackgroundMultihead" preference.

       -y, --cycle=SECONDS
           Cycle over the list of background images every SECONDS.  This overrules the
           "CycleBackgroundsPeriod" preference.

   GENERAL OPTIONS
       -d, --display=DISPLAY
           Use DISPLAY to connect to the X server.  If this option is missing then DISPLAY is
           read from the environment variable "DISPLAY".

       -h, --help
           Print a brief usage statement to stdout and exit.

       -V, --version
           Print the program version to stdout and exit.

       -C, --copying
           Print copying permissions to stdout for the program and exit.

       --sync
           Use a slower synchronous mode communication with X11 server.

FILES

   PREFERENCES
       By default icewmbg will load the background settings from the icewm(1) preferences files
       (see icewm-preferences(5)).  The settings read are:

         DesktopBackgroundCenter    - Display desktop background centered
         DesktopBackgroundScaled    - Display desktop background scaled
         DesktopBackgroundColor     - Desktop background color(s)
         DesktopBackgroundImage     - Desktop background image(s)
         ShuffleBackgroundImages    - Shuffle the list of background images
         SupportSemitransparency    - Support for semitransparent terminals
         DesktopTransparencyColor   - Semitransparency background color(s)
         DesktopTransparencyImage   - Semitransparency background image(s)
         DesktopBackgroundMultihead - One background over all monitors
         CycleBackgroundsPeriod     - Seconds between cycling over backgrounds

       First these settings are read from the preferences file.  Then the theme file from the
       current theme is read, which may overrule the preferences settings.  Lastly the
       prefoverride file is read, which overrides again.  Therefore, if you want to allow the
       theme to set the background use preferences for your settings, otherwise use prefoverride.
       See icewm-prefoverride(5).

   IMAGE SCALING
       Often a background image has a different width or height than the screen.  The image can
       then be replicated (tiled), centered or scaled. This is controlled by
       "DesktopBackgroundCenter" and "DesktopBackgroundScaled".  What happens for their
       combination is given by the following table:

         center:0 scaled:0 = The background is replicated in both directions.
         center:1 scaled:0 = The background is centered, but not scaled.
         center:1 scaled:1 = Fill one dimension and preserve the aspect ratio.
         center:0 scaled:1 = Fill both dimensions and preserve the aspect ratio.

SIGNALS

       icewmbg supports the following signals:

       SIGHUP
           icewmbg will restart itself.

       SIGINT, SIGTERM
           icewmbg will terminate.

       SIGUSR1
           icewmbg will reshuffle the list of background images and update the backgrounds of all
           work spaces.

SEE ALSO

       icewm(1), icewm-preferences(5), icewm-prefoverride(5), wmsetbg(1), xsetbg(1),
       xwallpaper(1).

BUGS

       Please report bugs at <https://github.com/bbidulock/icewm/issues>.

AUTHOR

       Brian Bidulock <mailto:bidulock@openss7.org>.

       See --copying for full copyright notice and copying permissions.

LICENSE

       IceWM is licensed under the GNU Library General Public License.  See the COPYING file in
       the distribution or use the --copying flag to display copying permissions.