Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 505)

Active Touch Area
You can specify the area of the screen used for tap and drag operations.
1.
Select [Active touch area].
2.
Set the area that will respond to touch.
Note
A round orange frame [ ] is displayed when you tap the screen with [ : AF
area ] set to [ Whole area AF ]. After you lift your finger at the position to move the
AF point to, [ ] is displayed and that subject is tracked. To cancel subject
selection, tap [ ].
505