200 lines
3.9 KiB
Plaintext
200 lines
3.9 KiB
Plaintext
.TH PAGE 1
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.SH NAME
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page \- view
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FAX,
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image, graphic, PostScript, PDF, and
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typesetter output
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files
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.SH SYNOPSIS
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.B page
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[
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.B -iRw
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] [
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.B -p
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.I ppi
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] [
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.B -j
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.I addr
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] [
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.IR file ...
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]
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.SH DESCRIPTION
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.I Page
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is a general purpose document viewer.
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It can be used to display the individual pages
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of a
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PostScript,
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PDF,
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or
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.IR troff (1)
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device independent output
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file.
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.I Troff
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output is simply converted to PostScript in order to be viewed.
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It can also be used to view any number of
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graphics files
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(such as a
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FAX
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page,
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a Plan 9
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.IR image (6)
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file, an Inferno bitmap file, or other common format).
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.I Page
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displays these
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in sequence.
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In the absence of named files,
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.I page
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reads one from standard input.
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.PP
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By default,
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.I page
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runs in the window in which it is started
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and leaves the window unchanged.
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The
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.B -R
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option causes
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.I page
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to grow the window if necessary
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to display the page being viewed.
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The
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.B -w
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option causes
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.I page
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to create a new window for itself.
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The newly created window will grow as under the
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.B -R
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option.
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.PP
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The
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.B -p
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option sets the resolution for PostScript and PDF
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files, in pixels per inch.
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The default is 100 ppi.
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.PP
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When viewing images with
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.IR page ,
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it listens to the
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.B image
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plumbing channel
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(see
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.IR plumber (4))
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for more images to display.
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The
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.B -i
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option causes
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.I page
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to not load any graphics files nor to read
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from standard input but rather to listen
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for ones to load from the plumbing channel.
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.PP
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The
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.B -j
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option with a page address
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.I addr
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jumps to the specified page on startup.
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.PP
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Pressing and holding button 1 permits panning about the page.
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.PP
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Button 2 raises a menu of operations on the current image or the
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entire set. The image transformations are non-destructive and are
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valid only for the currently displayed image. They are lost as soon
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as another image is displayed.
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The button 2 menu operations are:
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.TF Resize
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.TP
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.B Orig size
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Restores the image to the original. All modifications are lost.
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.TP
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.B Zoom
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controls magnification.
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.TP
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.B Fit
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Resizes the image so that it fits in the current window.
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.TP
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.B Rotate 90
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Rotates the image 90 degrees clockwise
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.TP
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.B Upside down
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Toggles whether images are displayed upside-down.
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.TP
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.B Next
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Displays the next page.
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.TP
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.B Prev
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Displays the previous page.
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.TP
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.B Snarf
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Writes the current page address to the snarf buffer.
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.TP
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.B Zerox
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Displays the current image in a new page window.
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Useful for selecting important pages from large documents.
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.TP
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.B Write
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Asks for a filename and writes the current image as
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Plan 9 bitmap.
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.TP
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.B Ext
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Shows the current image using external
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.IR jpg (1)
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program in a separate window. This is mostly useful for
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animated gifs.
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.PD
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.PP
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Button 3 raises a menu of the
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pages
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to be selected for viewing in any order.
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.PP
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Typing a
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.B q
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or
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control-D exits the program.
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.PP
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To go to a specific page, one can type its number followed by enter.
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Typing left arrow or backspace displays the previous page.
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Typing right arrow, space, or enter displays the next page.
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The up and down arrow pan up and down one half screen height,
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changing pages when panning off the top or bottom of the page.
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.PP
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.I Page
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calls
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.IR gs (1)
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to draw each page of PostScript
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and
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PDF
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.IR files .
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It also calls a variety of conversion programs, such as those described in
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.IR jpg (1),
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to convert the various raster graphics formats
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into Inferno bitmap files.
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Pages are converted ``on the fly,'' as needed.
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.SH EXAMPLES
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.TP
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.L
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page /sys/src/cmd/gs/examples/tiger.eps
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Display a color PostScript file.
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.TP
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.L
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page /usr/inferno/icons/*.bit
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Browse the Inferno bitmap library.
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.TP
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.L
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page -j /sys/doc/troff.ps!7 /sys/doc/troff.ps
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Jump to page 7 in the troff manual.
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.TP
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.L
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man -t page | page -w
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Preview this manual in a new window.
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.SH "SEE ALSO
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.IR gs (1),
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.IR jpg (1),
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.IR troff (1)
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.SH SOURCE
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.B /sys/src/cmd/page.c
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.SH BUGS
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The interface to the plumber is experimental.
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.SH HISTORY
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.I Page
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first appeared in Plan 9 from Bell Labs. It was rewritten from
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scratch for 9front (September, 2011).
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