Provided by: sioyek_2.0.0+dfsg-5.1_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
SIOYEK 2022-06-18 SIOYEK(1)