While accessing cameras, all guards visible by any accessible camera will be highlighted automatically without the need to constantly cycle through them.

This script is rather quick and dirty so it may not have longevity.

Update:
It should work properly now. It will automatically highlight every guard visible by every camera at once when you begin accessing cameras then cycle through one camera per frame after that. That way you can just quickly access and leave cameras to highlight every guard at once if you want to do that.

It should not highlight guards not visible by cameras, so let me know if that happens. It's mostly tested but you never know.