I also do not recall this. As I often work with my Audio Volume Keyframes to attenuate things, I can use this.
Thanks for that Alt-key (my case) "Fun Fact."
FYI - this item is listed in the online help. Here's a link for anyone in the future:
The same modifier key combo (ALT or OPTION) is used in most Adobe programs to drag-and-copy. Works with layers in Photoshop and After Effects. Very handy.
You can of course also select a set of keyframes, copy them, then paste them at the point of the CTI in the Effects panel. This can be useful with audio in particular. If you have volume drop into your main segment, then you want to bring it back up in identical reverse, you copy and paste, then drag the 1st keyframe that you copied past the 2nd one and you have your fade up.
You can also copy and paste keyframes between clips (only on the same property, however...so this wouldn't be necessarily useful for animating different effects together...After Effects is your friend there).
There's also info at that link about using timeline keyframes with another set of rules. For me personally, I have always worked in After Effects and prefer the previous methodology (in the Effects panel) versus modifying keyframes on the timeline.
Oops. Didn't see that. Thanks for pointing it out.
wow, cool, Colin, thanks
Will try on audio also...or whenever I make those keyframes that are like one frame away from each other for a range...