i'm really not keen on Vincent's 100% Mouse orientated ideal, but unless the HUD is fixed when it appears, chasing it with the cursor would be more akin to gaming than CAD so i'm really fond of "The More Keyboard Orientated the Better"(as long as they are easy to find/access), but we all have to be content with VW so, the Mouse can survive for a few more releases.
But it must be easy and practical and Above All, Intuitive without all the required options being hidden or locked or just forgotten about until someone complains about them being missing.
Grant's Hot Key suggestion sounds best, IMHO.