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     RULER(9.1)                                             RULER(9.1)

     NAME
          ruler - measure things on the screen

     SYNOPSIS
          ruler

     DESCRIPTION
          Ruler measures things on a mux(9.1) screen.  Press button 1
          to sweep out a rectangle anywhere on the screen.  For each
          rectangle swept, ruler displays the coordinates of the
          rectangle's corners (labeled down and up), the size of the
          rectangle and length of its diagonal.

          There is a menu on button 3.  The pixels and chars items
          control whether the size and diagonal are measured in units
          of pixels or characters; stop deactivates ruler without
          exiting; measure reactivates ruler.

     BUGS
          Character units are arbitrarily defined as the width and
          height of a `0' in the ruler layer.  This may have nothing
          to do with character sizes in other layers.
          Ruler's menu must pop up in its own layer, perhaps far away
          from the cursor.