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LENS(1)								       LENS(1)

NAME
       lens - interactive screen magnifier

SYNOPSIS
       lens

DESCRIPTION
       Lens  presents  a  magnified view in its window of an arbitrary area on
       the screen.  The default magnification is 4 (showing each  pixel	 as  a
       4×4  pixel  block  in  lens's  window). This may be changed by typing a
       digit on the keyboard (with 0 standing for 10), or by using the + and -
       keys  to increase or decrease the magnification by one unit.  The lower
       limit is ×1; the upper ×16.

       The interface to indicate what area to magnify is dictated by the mouse
       multiplexing  rules of rio(1).  Start by pressing mouse button 1 in the
       lens window and dragging, with the button pressed, to the center of the
       area  to	 magnify.   Lens  will	update the display as the mouse moves.
       Releasing the button freezes the lens display.  The magnified  view  is
       static—a	 snapshot,  not	 a  movie—but typing a space or .  key	in the
       lens window will refresh the display, as will changing  the  magnifica‐
       tion.

       To  make	 counting pixels easier, typing a g toggles whether a checker‐
       board grid is imposed on the magnified area.

       Button 3 brings up a menu of actions.

SOURCE
       /sys/src/cmd/lens.c

BUGS
       There should be an easier way to indicate what to magnify.

								       LENS(1)

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