Canon EOS 90D, Instruction Manual, Page: 390 / 888

178
Flash Function Settings
Clearing Flash Function Settings/Flash C.Fn Settings
M
1
Select [Clear settings].
2
Select the settings to be cleared.

Select
[Clear built-in fl ash set.]
,
[Clear
external fl ash set.]
, or
[Clear ext. fl ash
C.Fn set.]
.

On the confi rmation dialog, select
[OK]
.
Then the fl ash settings or Custom
Function settings will all be cleared.