Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 501)

Preview AF
This function keeps subjects generally in focus. The camera is ready to focus immediately
when you press the shutter button halfway.
1.
Select [ : Preview AF].
2.
Select [Enable].
Caution
Fewer shots are available when set to [ Enable ], because the lens is driven
continuously and battery power is consumed.
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