Maybe a little more keys on the pop up calculator? :)
R = relative, M O I free :)

Pretty soon you'll want the whole alphabet in there! :)

So far this hasn't been an issue because relative coordinates just aren't used too frequently. And if you are using them frequently you would generally want to use a keyboard for entering a larger quantity of numbers in anyway...

- Michael

I have just forgotten the "," (comma) for use it with the relative entry :)
So just 2 keys :)