rectsel
Start rectsel, click anywhere and drag to select a rectangular portion of
the screen. When you release, the selected area will be printed to stdout.
$ rectsel
100 100 50 50 # x y width height
Start rectsel, click anywhere and drag to select a rectangular portion of
the screen. When you release, the selected area will be printed to stdout.
$ rectsel
100 100 50 50 # x y width height