canon s100 control ring options

a question about options available through the control ring (ring functions button) on the canon s100:

can any options be added or deleted. i use the first three: STD, ISO and +/-. but i would

like to add jpg/raw and ND filter.

It does not appear that any additional choices can be added.

I then tried to add jpg/raw and ND filter to the custom star menu but could not add them there either.

any suggestions would kindly be appreciated.