xzoom(1) on Linux
The text 5955b5bea3cb, as Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it. The page shows this text now.
magnify part of X display, with real-time updates
Flags it lists
-
-d -
-display -
-geometry -
-source -
-x -
-xy -
-y