    man(1)                         jfbview man page                         man(1)

    NAME
           jfbview - PDF and image viewer for the Linux framebuffer.

    SYNOPSIS
           jfbview [OPTIONS] FILE

    DESCRIPTION
           jfbview is a PDF and image viewer for the Linux framebuffer.

    OPTIONS
           --help, -h
                  Shows help message.

           --fb=/path/to/dev
                  Specifies the path to the output framebuffer device. The default
                  is /dev/fb0.

           --password=xxx, -P xxx
                  Unlock PDF document with the given password.

           --page=n, -p n
                  Go to page n on start up.

           --zoom=n, -z n
                  Set initial zoom to be n percent. For example, "-z 75" sets zoom
                  to 75%.

           --zoom_to_fit
                  Start in zoom-to-fit mode.

           --zoom_to_width
                  Start in zoom-to-width mode. This is the default.

           --rotation=n, -r n
                  Set initial rotation to n degrees clockwise.

           --color_mode=invert, -c invert
                  Start in inverted color mode.

           --color_mode=sepia, -c sepia
                  Start in sepia color mode.

           --format=image
                  Forces the program to treat the input file as an image.

           --format=pdf
                  Forces the program to treat the input file as a PDF. By default,
                  the file format is detected based on its extension. If the  file
                  does  not  have  a ".pdf" (case is ignored) extension, this will
                  force jfbview to load it as a PDF.

           --cache_size=n
                  Selects the number of pages to cache. jfbview  has  a  in-memory
                  cache  of  pages rendered at a particular zoom and rotation set‐
                  ting. However, you may wish to adjust the  cache  size  down  if
                  this  cache is consuming too much memory, or you may wish to ad‐
                  just the cache size up for increased performance. If you have an
                  older  machine  with limited RAM you may want to set it close to
                  zero.

    KEY BINDINGS - MAIN VIEW
           jfbview has a set of vi-like key bindings and many commands can be pre‐
           fixed with a number. These are shown with a [n] prefix below.

           q      Quit.

           Tab    Open OUTLINE VIEW (table of contents, i.e., TOC; see below).

           /      Open SEARCH VIEW (see below).

           [n]arrow keys, [n]h/l/k/j
                  Move left/right/up/down.

           [n]Space/^F
                  Move n screens down. Default is 1.

           [n]^B  Move n screens up. Default is 1.

           [n]PageDown/PageUp
                  Go down / up n pages. Default is 1.

           [n]=/+ Zoom in n times. Default is 1.

           [n]-   Zoom out n times. Default is 1.

           s      Zoom to screen width.

           a      Zoom to fit.

           HOME/END
                  Go to first / last page in document.

           [n]G/g Go to page n. Default for G is last page; default for g is first
                  page.

           [n]m   Save current position, zoom and rotation in document in bookmark
                  n. The default is 0.

           [n]`   Restore saved position, zoom and rotation in bookmark n. The de‐
                  fault is 0.

           [n]r   Set rotation to n degrees. Default is 0.

           [n]>/. Rotate 90 degrees clockwise n times. Default is 1.

           [n]</, Rotate 90 degrees counter-clockwise n times. Default is 1.

           [n]z   Set zoom to n percent.

           e      Reload current file from disk.

           I      Toggle inverted color mode.

           S      Toggle sepia color mode.

    KEY BINDINGS - OUTLINE VIEW
           The outline view is toggled by the Tab key.

           Tab/q/Esc
                  Toggle outline view.

           j/Down, k/Up
                  Move down or up.

           PageDown/PageUp
                  Go down / up one page.

           Enter/g
                  Go to selected item.

           Space  Fold/unfold selected item.

           zR     Unfold all.

           zM     Fold all.

    KEY BINDINGS - SEARCH VIEW - SEARCH TEXT
           Esc    Toggle search view.

           Enter  Start search.

           Tab/Down/PageDown
                  Go to search results.

    KEY BINDINGS - SEARCH VIEW - SEARCH RESULTS
           q/Esc  Toggle search view.

           Space/Enter/g
                  Go to selected item.

           j/Down, k/Up
                  Move down or up.

           PageDown/PageUp
                  Go down / up one page.

           Tab//  Go to search text.

    BUGS
           Please submit bugs reports  and  any  suggestions  for  improvement  at
           https://github.com/jichu4n/jfbview/issues.

    AUTHOR
           Chuan Ji (chuan@jichu4n.com)

    2020-05-25                        25 May 2020                           man(1)