Canon MACRO RING LITE MR-14EX II Mode D'emploi page 43

Flash Custom Function Settings
You can set Custom Functions for flash units from the camera's menu
screen. The details displayed vary by the camera. If C.Fn-22 is not
displayed, set it by operating the flash unit. For the Custom Functions,
see pages 61-64.
When using a camera released in 2011 or earlier, or EOS REBEL T5/
1200D, the C.Fn-22 settings are not cleared even if [Clear all Speedlite
C.Fn's] or [Clear ext. flash C.Fn set.] is selected. When the procedure
described in "Clearing All the Custom/Personal Functions" on page 60 is
performed, all the Custom Functions are cleared.
You cannot set or clear Personal Functions (P.Fn/p.65) from the camera's
menu screen. Set them by operating the flash unit.
Flash Control from the Camera's Menu Screen
Select [Flash C.Fn settings].
1
Select [Flash C.Fn settings] or
[External flash C.Fn setting].
The flash Custom Function settings
screen is displayed.
Set the Custom Function.
2
Select the Custom Function number
and set the function.
To clear all the Custom Function
settings, select [Clear all Speedlite
C.Fn's] or [Clear ext. flash C.Fn
set.] in step 1.
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