How to select an OSnap menu option without a mouse click

Hello-

I'm looking at replacing my ACAD with DS and am playing around with it.

My first dumb newbie question regards the OSnap menu.

In ACAD I use my middle mouse button to pull up the OSnap menu and then I press the letter of the snap that I want to use.

With DS I am getting the osnap menu with my middle button but when I enter "E" for endpoint on the keyboard, I am only highlighting the endpoint snap.  I then have to go over and click on it with the cursor to get it selected.  This doesn't seem to be an issue for those snaps that do not share a starting letter with another snap (for example midpoint gets selected when I type in "M" I'm guessing because it doesn't share the "M" with any other snap function).  Is there anyway to resolve this so I don't have to make excess mouse clicks to select endpoint...can I assign selection letters to the snap functions so that another function doesn't share the "E" with Endpoint? Or some other work-around?

Thanks!