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 statica snapshot, not a moviebut typing a space or
.
key in the
lens
window will refresh the
display, as will changing the magnification.
To make counting pixels easier, typing a
g
toggles whether a checkerboard 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.