Canon Macro Ring Lite MR-14EX II User Manual page 60

C / >: Setting Custom and Personal Functions
Clearing All the Custom/Personal Functions
By pressing function button 2 <3> and then function button 1
<;> on the Custom Functions screen, you can clear the Custom
Functions that have been set.
Similarly, by performing the same operations on the Personal Functions
screen, you can clear the Personal Functions that have been set.
If C.Fn-22 is not displayed after setting the flash unit's Custom Functions
from the camera's menu screen, set them using the operations described on
page 58.
You can set or clear all Custom Functions of the flash unit from the camera's
menu screen (p.41).
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