Further Settings (Options May Vary); Games And Experiences - Acer Predator 21 X User Manual

26 - Tobii Eye Tracking
Finally name your profile; the name of the current profile will
be shown in the Notification area menu.
Note
If you occasionally wear glasses or contacts, for best accuracy
you may need to set up multiple profiles, one with and one without
glasses or contacts.

Further settings (options may vary)

Select the Tobii icon

Games and Experiences

Many games support eye tracking to
control movement and viewing angles.
Select Games and Experiences to see
games extensions and options
in the Notification area.