AIPS HELP file for TVZOOM in 31DEC19
As of Tue Jun 25 21:55:34 2019
TVZOOM: Verb which activates the TV zoom
Cursor used to give zoom position and buttons to
increment or decrement the magnification.
Use: Interactive function to set TV zoom magnification factor
and to set the point about which the zoom takes place.
The cursor points at the zoom center which will be
shifted to the center of the screen. A hit on buttons A
or B increments the magnification factor and on button C
decrements the magnification factor in a circular
fashion. Hit button D to exit. The available
magnification factors depend on the type of TV. IIS
model 70s have factors of 1, 2, 4, and 8; the IVAS has
factors from 1 through 16.