Install caffeine by entering the following commands in the terminal:
sudo apt update sudo apt install caffeine
Description:
prevent the desktop becoming idle in full-screen mode
Caffeine prevents the desktop from becoming idle when an application is running full-screen. A desktop indicator ‘caffeine-indicator’ supplies a manual toggle, and the command ‘caffeinate’ can be used to prevent idleness for the duration of any command.
Homepage: https://launchpad.net/caffeine
Version: 2.9.4-1
Section: universe/misc