How to Activate the Save Idle Screens Feature
Available in: Actual Window Manager, Actual Multiple Monitors.
Open the configuration window of the software.
Go to the Multiple Monitors tab and open the Screen Saver -> Save Idle Screens property sheet.
Check the “Enable” box and the desired activation hotkey.
Select the first monitor and set the desired screen saver in the appropriate field.
Repeat above actions for the other monitors.
Apply your adjustments.