Often when key framing something, the end result has the right motion but the speed is off.  For some reason, usually a motion is unnaturally slow (both in my videos and many other people's clips I've seen).

Example:  You want your avatar to reach up and scratch his head.  But it takes 5 seconds instead of 2.

THE REQUEST:

I would like to drag across a bunch of key frames in the timeline editor, and drag either the first or last one to "stretch" the key frames to span more time, or "compress" the key frames to span less time.

That would make it easy to make an overall action move faster or slower, without having to adjust each key frame indiviually.

Currently "Drag" simply moves all the selected key frames, and "Ctrl-Drag" makes a copy of them.

Perhaps something like "Alt-Drag" to trigger the "stretch" behavior.

ADDED LATER...

You can stretch (or compress) voice recordings and the associated visemes.  That's a good example of what I'm looking for, but also let you do it for a groups of selected keframes for Transforation and Motion.