Install curtain by entering the following commands in the terminal:
sudo apt update sudo apt install curtain
Description:
handy curtain for the desktop
Curtain is a tool that shows a movable and resizable curtain on the desktop. This is especially useful when making presentations to hide and unhide things. . Curtain is XInput-Aware, so you can use it with a graphic tablet or a whiteboard. . This program has been implemented for educational purposes.
Homepage: http://code.google.com/p/ardesia/
Version: 0.3-1.1
Section: universe/misc