Configuring Custom Functions
Configure Custom Functions for advanced camera customization
1 [Custom Functions (C.Fn)]
2 Choose an item.
buttons → button
3 Configure the settings.
C.Fn I:Exposure
Safety shift
Set to [1:Enable] for automatic adjustment of the
shutter speed and aperture value to bring the
exposure level closer to standard exposure if
standard exposure would not be available otherwise
under your specified shutter speed or aperture value
in Tv or Av mode.
C.Fn II:Others
Dial direction
during Tv/Av
The dial direction for adjusting the shutter speed
or aperture value can be changed.
C.Fn II:Others
Custom Controls
Customize functions of buttons, such as the shutter
button.
[Custom Functions (C.Fn)]
buttons → 
button
dial direction for adjusting the shutter speed