Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 497)

Magnified View
You can check the focus by pressing the < > button to magnify display by approx. 5× or
10×.
Magnification is centered on the tracking frame when the tracking frame is white (as an
active frame) after subject detection.
Magnification is centered on the AF point (in the center of the screen) when subjects are
detected and the tracking frame is gray, or when subjects cannot be detected.
Autofocusing is performed in magnified view if you press the shutter button halfway.
When set to Servo AF or AI Focus AF, pressing the shutter button halfway in magnified
view reverts to the normal view for focusing.
Caution
If focusing is difficult in the magnified view, return to the normal view and perform
AF.
If you perform AF in the normal view and then use the magnified view, accurate
focus may not be achieved.
AF speed differs between the normal view and magnified view.
Preview AF and Movie Servo AF are not available in magnified view.
With the magnified view, achieving focus becomes more difficult due to camera
shake. Using a tripod is recommended.
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