Actual Tools / Products / Actual Window Manager / Online User Manual / Features
Ignore Deactivation (Keep Focus)
Actual Window Manager,
Actual Multiple Monitors
The Ignore Deactivation action forces the currently active window ignore the "focus lost"
notification from the system, so the window's host application continues to "think" that the window remains active.
This may be useful when you want to run a full-screen video or play a game on one monitor while working with other windows on another monitor.