How to take screenshots with Fanuc tablet TP?

I'm trying to take screenshots for education purposes with the Fanuc tablet TP. Tablet is Galaxy Tab Active Pro SM-T540 and robot is CRX-10iA.

So is there a way to take screenshots? Where are they saved and how can I retrieve them? I'm pretty new to using the robot, it is part of a school project I'm doing.

Are there any in-depth manuals/tutorials for using the robot and TP?

I've tried that. It doesn't seem to work. It takes screenshots when I'm not using the Fanuc app. So it seems I'm out of luck