glenda.party
term% ls -F
term% cat index.txt
PAGE(1)                     General Commands Manual                    PAGE(1)



NAME
       page - view FAX, image, graphic, PostScript, PDF, and typesetter output
       files

SYNOPSIS
       page [ -abirPRvVw ] [ -p ppi ] [ file...  ]

DESCRIPTION
       Page is a general purpose document viewer.  It can be used  to  display
       the individual pages of a PostScript, PDF, or tex(1) or troff(1) device
       independent output file.  Tex or troff output is  simply  converted  to
       PostScript in order to be viewed.  It can also be used to view any num‐
       ber of graphics files (such as a FAX page, a Plan 9 image(6)  file,  an
       Inferno  bitmap  file, or other common format).  Page displays these in
       sequence.  In the absence of named files, page reads one from  standard
       input.

       By  default,  page runs in the window in which it is started and leaves
       the window unchanged.  The -R option causes page to grow the window  if
       necessary  to display the page being viewed.  The -w option causes page
       to create a new window for itself.  The newly created window will  grow
       as  under the -R option.  If being used to display multipage documents,
       only one file may be specified on the command line.

       The -p option sets the resolution for PostScript and PDF files, in pix‐
       els  per inch.  The default is 100 ppi.  The -r option reverses the or‐
       der in which pages are displayed.

       When viewing a document, page will try to guess the true bounding  box,
       usually  rounding up from the file's bounding box to 8½Ã11 or A4 size.
       The -b option causes it to respect the bounding box given in the  file.
       As  a  more  general problem, some PostScript files claim to conform to
       Adobe's Document Structuring Conventions but do not.  The -P option en‐
       ables  a  slightly  slower  and  slightly more skeptical version of the
       PostScript processing code.  Unfortunately, there are PostScript  docu‐
       ments  that  can only be viewed with the -P option, and there are Post‐
       Script documents that can only be viewed without it.

       When viewing images with page, it listens to the image plumbing channel
       (see plumber(4)) for more images to display.  The -i option causes page
       to not load any graphics files nor to  read  from  standard  input  but
       rather to listen for ones to load from the plumbing channel.

       The  -v option turns on extra debugging output, and the -V option turns
       on even more debugging output.  The  -a  option  causes  page  to  call
       abort(2) rather than exit cleanly on errors, to facilitate debugging.

       Pressing and holding button 1 permits panning about the page.

       Button 2 raises a menu of operations on the current image or the entire
       set.  The image transformations are non-destructive and are valid  only
       for  the  currently  displayed image.  They are lost as soon as another
       image is displayed.  The button 2 menu operations are:

       Orig size
              Restores the image to the original. All modifications are lost.

       Zoom   Prompts the user to sweep a rectangle on the image which is  ex‐
              panded proportionally to the rectangle.

       Fit window
              Resizes the image so that it fits in the current window.

       Rotate 90
              Rotates the image 90 degrees clockwise

       Upside down
              Toggles whether images are displayed upside-down.

       Next   Displays the next page.

       Prev   Displays the previous page.

       Zerox  Displays the current image in a new page window.  Useful for se‐
              lecting important pages from large documents.

       Reverse
              Reverses the order in which pages are displayed.

       Write  Writes the image to file.

       Button 3 raises a menu of the pages to be selected for viewing  in  any
       order.

       Typing  a q or control-D exits the program.  Typing a u toggles whether
       images are displayed upside-down.  (This is useful in the  common  case
       of mistransmitted upside-down faxes).  Typing a r reverses the order in
       which pages are displayed.  Typing a w will write the currently  viewed
       page  to  a new file as a compressed image(6) file.  When possible, the
       filename is of the form basename.pagenum.bit.  Typing a  d  removes  an
       image from the working set.

       To  go  to  a specific page, one can type its number followed by enter.
       Typing left arrow, backspace, or  minus  displays  the  previous  page.
       Typing right arrow, space, or enter displays the next page.  The up and
       down arrow pan up and down one half screen height, changing pages  when
       panning off the top or bottom of the page.

       Page  calls  gs(1)  to  draw each page of PostScript and PDF files.  It
       also calls a variety of conversion programs, such as those described in
       jpg(1),  to  convert  the  various raster graphics formats into Inferno
       bitmap files.  Pages are converted ``on the fly,'' as needed.

EXAMPLES
       page /sys/src/cmd/gs/examples/tiger.eps
              Display a color PostScript file.

       page /usr/inferno/icons/*.bit
              Browse the Inferno bitmap library.

       man -t page | page -w
              Preview this manual in a new window.

SEE ALSO
       gs(1), jpg(1), tex(1), troff(1)

SOURCE
       /sys/src/cmd/page

DIAGNOSTICS
       The mouse cursor changes to an arrow and ellipsis when page is  reading
       or writing a file.

BUGS
       Page supports reading of only one document file at a time, and the user
       interface is clumsy when viewing very large documents.

       When viewing multipage PostScript files that do not contain  ``%%Page''
       comments,  the  button  3  menu  only contains ``this page'' and ``next
       page'': correctly determining page boundaries in Postscript code is not
       computable in the general case.

       If  page has trouble viewing a Postscript file, it might not be exactly
       conforming: try viewing it with the -P option.

       The interface to the plumber is unsatisfactory.  In  particular,  docu‐
       ment references cannot be sent via plumbing messages.

       There are too many keyboard commands.



                                                                       PAGE(1)