Why are there two envelope icons onthe motion clips?  Whenever I implement an envelope only one of the icons changes?  Can someone explain this?

Sorry if this is a stupid question.

TIA

The first one is the the "transition curve", and the second is the "time warp". I'm not sure that "transition curve" has any effect on a clip, and don't have time to figure it out right now, as I'm about to head out of town for a few days. The "time warp" does what you would expect the transition curve to do on a clip.

YES!  Thank you! Thank you!  I googled using your key-words and now all is clear.  Clear-ish -- need to make some tests.

Thanks again!

--Bex.