Canon EOS M2 Instruction Manual page 304

3 Setting Speedlite Functionst
Flash Custom Function Settings
For details on the Speedlite's Custom Functions, refer to the instruction
manual of the Speedlite (sold separately).
Clear Settings
With an EX-series Speedlite, if the [Flash metering mode] Custom Function is
set to [TTL] (autoflash), the Speedlite will fire at full output.
The Speedlite's Personal Functions (P.Fn) cannot be set or canceled with the
camera's [External Speedlite control] screen. Set it with the Speedlite.
304
1
Select [Flash C.Fn settings].

Select [Flash C.Fn settings], then press
<0>.
2
Set the functions.

Press the <Y> <Z> keys to select the
number, then press <0>.

Select the setting, then press <0>.
1 Select [Clear settings].

Under the [A2: External Speedlite
control] tab, select [Clear settings],
then press <0>.
2
Select the settings to be cleared.

Select either [Clear flash settings] or
[Clear all Speedlite C.Fn's], then press
<0>.

When you select [OK], the respective
flash settings will be cleared.