How to mirror part of the primary monitor to the secondary monitor

Roger_TI

Commendable
Jun 11, 2016
6
0
1,510
As in the heading, I just need a mirror function, where part of the display of a running program is to be mirrored over to a secondary monitor. If the secondary monitor display can be set to a lower resolution such that the mirrored section fills the screen, that's perfect.