Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 538)

Use as a focusing or control ring
Menu-based switching of lens focus/control ring functionality.
Caution
Available when using lenses that have a combination focusing ring/control ring but
have no switch to switch between these features.
Use as focus ring
The ring works as a focusing ring.
Use as control ring
The ring works as a control ring.
Note
To restrict [ : Focus mode ] to [ AF ] when [ Use as control ring ] is selected,
press the < > button and add a checkmark [ ] to [ Focus mode is AF when
used as a control ring ].
Switching is also possible from the Quick Control screen, when customized with
[
: Customize Quick Controls ] ( ).
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