Canon EOS 5D Mark III Instruction Manual page 328

82: Custom Controls
Assignable Functions to Camera Controls
Metering and AF start
AF stop
Switch to registered AF function
ONE SHOT z AI SERVO
Switch to registered AF point
AF point direct selection
Metering start
AE lock
AE lock (while button pressed)
AE lock (hold)
FE lock
Set ISO speed (hold button, turn
Set ISO speed (
Shutter speed setting in M mode
Aperture setting in M mode
One-touch image quality setting
One-touch image quality (hold)
Image quality
Picture Style
Depth-of-field preview
IS start
VF electronic level
Menu display
Image playback
Magnify/Reduce (press SET, turn
No function (disabled)
328
Function
during metering)
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