RX100 - memory store function?

Can anyone tell me how you store and use custom memory settings on this camera?

The manual does not go into detail about this and I am yet to find out anything via Google.

I would like to set 2 of them up for macro and WA/Fisheye shots.

Has anyone got any settings they use underwater, to make the best use of this cool compact camera?

THanks

Yes I used that but it is inpractical it is better like panasonic or canon has where you have a c1 c2 mode on the dial

TBH I'll just change modes in the water.