V8/usr/man/man9/ruler.9

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.TH RULER 9.1
.SH NAME
ruler \- measure things on the screen
.SH SYNOPSIS
.B ruler
.SH DESCRIPTION
.I Ruler
measures things on a jerq screen.
Press button 1 to sweep out a rectangle anywhere on the screen.
For each rectangle swept,
.I ruler
displays the coordinates of the rectangle's corners (labelled
`down' and `up'),
the size
of the rectangle and length of its diagonal.
.LP
There is
a menu on button 3.
The
.I pixels
and
.I chars
buttons control whether the size and diagonal measurements
are in pixel or
9x14 character units (the size used by
.I jim(9.1)
and
.IR mux(9.1) ).
The
.I stop
button deactivates
.I ruler
without exiting.
Hitting
.I measure
reactivates
.IR ruler .
.I Exit
exits.
.SH BUGS
Ruler's menu must pop up in its own layer, perhaps far
away from the cursor.