Canon EOS R50 Advanced User's Manual page 740

C.Fn4
Clear all Custom Func. (C.Fn)
Selecting [ : Clear all Custom Func. (C.Fn)] clears all Custom Function settings except
[Customize buttons] and [Customize control ring].
Note
To clear settings configured with [
control ring], select [
: Customize buttons] and [
: Clear customized settings].
740
: Customize