Canon EOS 6D Mark II Instruction Manual page 490

3 Custom Function SettingsN
C.Fn III-2
0: Normal
1: Reverse direction
Dial turning direction when setting the shutter speed and aperture
can be reversed.
In the <a> shooting mode, the turning direction of the <6> and
<5> dials will be reversed. In other shooting modes, the turning
direction of only the <6> dial will be reversed. The <5> dial's
turning direction in the <a> mode and the turning direction to set
the exposure compensation in the <d>, <s>, and <f>
modes will be the same.
C.Fn III-3
This is to set the lens retraction mechanism for when a gear-driven
STM lens (such as EF40mm f/2.8 STM) is attached to the camera. You
can set it to retract the extended lens automatically when the camera's
power switch is set to <2>.
0: Enable
1: Disable
With auto power off, the lens will not retract regardless of the setting.
Before detaching the lens, make sure that it is retracted.
When [0: Enable] is set, this function takes effect regardless of the lens's
focus mode switch setting (AF or MF).
C.Fn III-4
You can assign frequently-used functions to camera buttons or dials
according to your preferences. For details, see page 497.
490
Dial direction during Tv/Av
Retract lens on power off
Custom Controls