Superpose Tool

Superposes a rectangular area from one window
onto another.

Load window numbers for the 2 source windows.
Press "SUPERPOSE" button and then move the mouse
(without holding any buttons) to the second of
your windows. Press and hold the left mouse button
at a point where you want an area from the first
window superposed on the second. Moving the mouse
(keeping the button down) expands the area. If
you also press the shift key, the area will move
with the mouse rather than expand. In this way you
can make the superposed area a rectangle of any
size at any position on the second window. Release
the mouse button to stop.

To get rid of this window, press help again. To get
rid of the superpose tool window and this window,
press dismiss.