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- Draw your mask
- Press the M key to reveal the Mask Path
- You'll see a stopwatch next to Mask Path
- Click on the stopwatch
- You'll see a diamond appear in the timeline window under the CTI (current time indicator)
- Move down the timeline, move any mask vertex
- You will now see a new diamond in the timeline under the CTI
That's it. If you're not seeing keyframes in the timeline you're not animating.
You may be moving the whole layer, check the position values, but more likely you've missed the step of turning on animation for the mask.
One other thing you can do in CS5. The second icon from the right looks like a stopwatch. It's the "Auto Keyframe" switch. Click it, it will turn red, then, the first time you change any property you'll start setting keyframes. I don't use this feature but some do. Any time you have set a keyframe in any property, After Effects will automatically add a new keyframe whenever you change the property. The Auto Keyframe property simply eliminates the first step, but it doesn't set keyframes at all until you move off the original values so it isn't really saving a step....
Hope this helps.
Thank you so much!
Very helpful and detailed. Worked like a charm. User error, haha.
If you're really new, you should know that AE will frustrate and befuddle the novice who tries to learn it intuitively. I urge you to take advantage of the resources found here: