The mouse may have gone to sleep – click a mouse button to wake it [read more]
If you still can’t see the mouse, it’s because it is on a different display from the one you’re looking at.
Move the mouse down and right – this will bring it onto the righthand monitor on the desk.
This works because the computer has several different outputs, and the mouse can move to any of them – like several pieces of a jigsaw.
You can move the mouse around the whole ‘jigsaw’ – but that means sometimes it’ll be out of view. For example, at the desk, you can’t see output 2. Also, when ProPresenter is running, output 3 is taken over by the main output.
More info about the displays is here.