Canon ST-E3-RT Manual De Instrucciones página 54

Transmitter Control from Camera's Menu Screen
Transmitter Custom Function Settings
The displayed contents vary depending on the camera. If C.Fn-20 and
22 are not displayed, set them by operating the transmitter. For the
Custom Functions, see pages 56 to 57.
When using a camera released up to 2011, the C.Fn-20 and 22 settings are
not cleared even if [Clear all Speedlite C.Fn's] is selected. When following
the "Clearing All the Custom Functions" operation on page 55, all the
Custom Functions are cleared.
You cannot set or clear all Personal Functions (P.Fn/p.58) from the camera's
menu screen. Set them by operating the transmitter.
52
Select [Flash C.Fn settings].
1
Select [Flash C.Fn settings] or
[External flash C.Fn setting].
You can now set the Custom
Functions of the transmitter.
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.