Provided by: sioyek_2.0.0+dfsg-3_amd64 
NAME
sioyek - a PDF viewer designed for reading research papers and technical books.
SYNOPSIS
sioyek [OPTIONS] [FILENAME]
DESCRIPTION
With no arguments, open the most recent document by default. If none exists and
should_load_tutorial_when_no_other_file is set in a preference file (see below), then open
a tutorial PDF.
OPTIONS
-v, --version
Displays version information
--reuse-instance
When opening a new file, reuse the previous instance of sioyek instead of opening a
new window.
--new-instance
When opening a new file, create a new instance of sioyek.
--new-window
Open the file in a new window but within the same sioyek instance.
--reuse-window
Force sioyek to reuse the current window even when should_launch_new_window is set.
--page PAGE
Which page to open.
--inverse-search COMMAND
The command to execute when performing inverse search. In COMMAND %1 is filled
with the file name and %2 is filled with the line number.
--forward-search-file FILE
Perform forward search on file FILE must also include --forward-search-line to
specify the line
--forward-search-line LINE
Perform forward search on line LINE must also include --forward-search-file to
specify the file
--forward-search-column COLUMN
Perform forward search on column COLUMN must also include --forward-search-file to
specify the file
--zoom ZOOM
Set zoom level to ZOOM
--xloc XLOC
Set x position within page to XLOC
--yloc YLOC
Set y position within page to YLOC
--shared-database-path PATH
Specify which file to use for shared data (bookmarks, highlights, etc.)
-h, --help
Displays help on commandline options
--help-all
Displays help including Qt specific options
FILES
/etc/sioyek/keys.config
Default key bindings
/etc/sioyek/prefs.config
Default preferences
/usr/share/sioyek/shaders
Default shader files
/usr/share/sioyek/tutorial.pdf
sioyek tutorial PDF
$XDG_CONFIG_HOME/sioyek/keys_user.config
User key bindings
$XDG_CONFIG_HOME/sioyek/prefs_user.config
User preferences
CONFIGURATION
Sioyek supports many preferences that can be set in a file as described above.
Each preference is a token, some whitespace, and a value. A value can be a
• integer
• boolean: integer which is exactly either 0 or 1
• float: period separated decimal value
• string: sequence of characters, without quotes
• fvec[n]: space separated list of n floats
• ivec[n]: space separated list of n integers
• color_3: space separated list of 3 floats or integers between 0 and 1, representing
RGB values.
• color_4: space separated list of 4 floats or integers between 0 and 1. The first
three are RGB values, and the last one is opacity.
text_highlight_color color_3
Highlight color when text is selected using mouse.
vertical_line_color color_4
Color of the highlight bar when right click is pressed (to bring up the reading
guide). Alias preference: visual_mark_color.
search_highlight_color color_3
Highlight color when text is a search match.
link_highlight_color color_3
Highlight color for PDF links (note that highlight is off by default and can only
be seen by performing a toggle_highlight command. See keys.config for more
details).
synctex_highlight_color color_3
Highlight color for synctex forward search highlights.
background_color color_3
Background color.
dark_mode_background_color color_3
Background color in dark mode.
dark_mode_contrast float
Contrast in dark mode. Higher values render the PDF with dimmer text.
default_dark_mode boolean
Start in dark mode if 1, light mode if 0.
item_list_prefix string
Text to prefix every bookmark in bookmark lists.
inverse_search_command string
The command to use when trying to do inverse search into a LaTeX document.
Uncomment and provide your own command. %1 expands to the name of the file and %2
expands to the line number.
zoom_inc_factor float
The factor by which we increase/decrease zoom when performing zoom_in or zoom_out.
vertical_move_amount float
How many (screen) inches we move vertically/horizontally when performing
move_up/down commands.
horizontal_move_amount float
How many (screen) inches we move vertically/horizontally when performing
move_left/right commands.
move_screen_ratio float
How many inches we move vertically/horizontally when performing move_left/right
commands.
flat_toc boolean
If 0, Table of Contents is shown in a hierarchical tree, otherwise it is a flat
list (can improve performance for extremely large table of contents).
should_use_multiple_monitors boolean
If it is 1, when launching the application if we detect multiple monitors, we
automatically launch the helper window in second monitor.
should_load_tutorial_when_no_other_file boolean
If the last opened document is empty, load the tutorial pdf instead..
should_launch_new_instance boolean
If it is 0, then we use the previous instance of sioyek when launching a new file.
otherwise a new instance is launched every time we open a new file.
should_launch_new_window boolean
Open the file in a new window but within the same sioyek instance.
should_draw_unrendered_pages boolean
If set, we display a checkerboard pattern for unrendered pages (by default we
display nothing).
check_for_updates_on_startup boolean
If set, shows a notification on startup if a new version of sioyek is available.
sort_bookmarks_by_location boolean
If set, we sort the bookmarks by their location instead of their creation time.
shared_database_path string
Path to shared.db database file. If not set, we use the default path. you can set
this to be a file in a synced folder (e.g. dropbox folder) to automatically sync
sioyek across multiple computers.
On GNU/Linux, this refers to ~/.local/share/sioyek/shared.db.
hover_overview boolean
Displays an overview of destination when hovering over a link with mouse (no need
to right click).
visual_mark_next_page_fraction float
When moving to the next line using visual marker, this setting specifies the
distance of the market to the top of the screen in fractions of screen size.
visual_mark_next_page_threshold float
When moving to the next line using visual marker, this setting determines at which
point we move the screen.
ui_font string
Font to use for user interface (file browser, bookmarks, etc.).
font_size integer
Font size
middle_click_search_engine string
Search engine to use for middle click lookup. This value should be a string
corresponding to the letters, *, in another string preference which specifies the
url, search_url_*.
For example,
• search_url_g https://www.duckduckgo.com/search?q=
• middle_click_search_engine g
Will use the duckduckgo address for middle click search.
shift_middle_click_search_engine string
Search engine to use for shift middle click lookup. Value is analogous to
middle_click_search_engine.
startup_commands string
Semicolon separated list of commands to run on startup.
status_bar_font_size integer
Font size for text in the status bar.
custom_background_color color_3
Background color to use when executing the command toggle_custom_color.
custom_text_color color_3
Text color to use when executing the command toggle_custom_color.
rerender_overview boolean
If 0, we use the previous renders for overview window which may cause it to be
blurry if it is 1, we rerender with the proper resolution for overview window which
looks better but may increase power consumption.
wheel_zoom_on_cursor boolean
Normally mouse wheel zooms in on the middle of the screen, but if this is set to 1,
we zoom in on the cursor.
linear_filter boolean
Apply linear texture filtering by passing GL_LINEAR to glTexParameteri. This means
that for a pixture being textured, we use the weighted average of the four texture
elements closest to its center.
display_resolution_scale float
Resolution multiplier for PDF viewer.
status_bar_color color_3
Color of the status bar background.
status_bar_text_color color_3
Color of the status bar text.
main_window_size ivec[2]
Default size (in width and height) of the main window when a helper window is
opened. You can copy the value of this config using the copy_window_size_config
command.
If this is not set, then we use the full size of the first screen if there are
multiple monitors, otherwise we use half of the width of the screen and the whole
height -- a vertical split in half.
main_window_move ivec[2]
Location to snap the main window to in x and y co-ordinates when the helper window
is opened.
If not set, use (0, 0), top left of the first screen.
helper_window_size ivec[2]
Default size (in width and height) of the helper window when it is opened.
If not set, use the full size of the second screen if there are multiple monitors,
otherwise use half of the width of the first screen and the whole height.
helper_window_move ivec[2]
Location to snap the helper window to in x and y co-ordinates when the helper
window is opened.
If not set, then use (first screen width/2, 0) if there is only one monitor, and
(second screen width, 0) if there are two.
touchpad_sensitivity float
Touchpad sensitivity.
page_separator_width float
Width of the page separator.
page_separator_color color_3
Color of the page separator.
single_main_window_size ivec[2]
Default size of the main window when the helper window has been closed.
If not set, uses the size of the whole screen.
single_main_window_move ivec[2]
Location to snap the main window to when the helper window has been closed.
If not set, uses (0, 0).
fit_page_to_width_ratio float
Ratio of page width to use for fit_to_page_width_ratio command. A value of 1 would
use the whole window width for the page.
collapsed_toc boolean
If set, we initially collapse table of content entries.
ruler_mode boolean
If set, we highlight the current line in visual_scroll_mode by masking above and
below the current line. If not set, we only mask below the line.
ruler_padding float
Ruler padding between the edges of the top and bottom of the text and the ruler.
ruler_x_padding float
Ruler padding between the edges of the left and right of the text and the ruler.
text_summary_url string
Text summary url for fastread. Fastread mode (turned on with the command
toggle_fastread) by default queries a url for information about which characters of
each word on the page to highlight. An implementation of such a server based on a
language model is available here:
https://github.com/ahrm/sioyek/blob/main/scripts/summary_highlight_server.py.
By default, both this script and sioyek will bind to localhost:5000.
text_summary_should_refine boolean
Language model option for the fastread server program. If 1, then prevent
highlights in the middle of words by always highlighting starting from the
beginning of the word until the first mispredicted character.
text_summary_should_fill boolean
Language model option for the fastread server program. If 1, then highlight the
entire word when over 50% of it is highlighted.
text_summary_context_size integer
Context size to use on the fastread server. Number of characters in context for
next character prediction.
use_heuristic_if_text_summary_not_available boolean
Use heuristic if text summary url does not return highlights. The heuristic
involves choosing ceiling(length*0.3) characters of every word to emphasize.
papers_folder_path string
A directory which sioyek watches for new papers. If a new paper added to this
directory while we are creating a portal from another document, this new document
will automatically be used as the destination of the portal.
enable_experimental_features boolean
Enable possibly unstable experimental features
create_table_of_contents_if_not_exists boolean
Automatically create a table of contents for the document if it doesn't already
have one.
max_created_toc_size integer
Limits the maximum size of created table of contents.
force_custom_line_algorithm boolean
Use custom algorithm based on pixmaps to compute rectangles around the lines of the
document.
overview_size fvec[2]
Size, width and height, of the overview window. The overview window is triggered by
right clicking on an internal link, or hovering if hover_overview is set to 1.
overview_offset fvec[2]
Offset of the overview window as floats from the center of the page.
ignore_whitespace_in_presentation_mode boolean
Always use fit_to_page_smart (ignoring whitespace) in presentation view.
exact_highlight_select boolean
If set to 0, then in word select mode, select the whole word even if the cursor is
only partially on the word. If set to 1, then select the word only if the range of
the cursor's selection fully includes the word.
show_doc_path boolean
If set to 0, then only show the filename in the dialog to choose to open a previous
doc (open_prev_doc). If 1, then show the entire file path.
fastread_opacity float
Opacity of the dimmed portion of words in fastread mode.
highlight_color_* color_3
Color of the highlight color bound to symbol * (should be one character).
should_warn_about_user_key_override boolean
If set to 0, then don't warn the user about key definition overrides when the two
definitions are in different files. If set to 1, then always warn the user when
keys are overridden.
single_click_selects_words boolean
If set to 0, then single clicks select words and double clicks allow selection of
arbitrary ranges of characters. If set to 1, then double clicks select words and
single clicks allow selection of arbitrary ranges of characters.
highlight_middle_click boolean
If set to 1, then middle clicks add a highlight with select_highlight_type when a
selection is active and no preview is open. If set to 0, a smart jump is always
attempted.
super_fast_search boolean
If set to 0, search is performed by the mupdf backend. If set to 1, a super fast
search index is used instead. This leads to a slight increase in memory.
case_sensitive_search boolean
If set to 1, search and regex_search are case-sensitive. If set to 0, search and
regex search are case-insensitive.
BUGS
If you find a bug in sioyek please report it at https://github.com/ahrm/sioyek/issues