(2) A clear touch panel that allows the user to command the computer by touching ... The part of the screen that was overlaid is saved and restored when the screen overlay is removed.

If you can’t remove a crosshair that’s stuck on your computer screen ... that allows users to enable a crosshair overlay through the OSD (On-Screen Display) settings so that they can have ...

Depending on your device, the Settings app might call this feature 'Display over other apps,' 'Draw over other apps,' or ...