For my project I created a mask. After the mask was finished I animated the mask path. After rendering I wanted to edit the mask a little bit, just by moving to vertexes a little bit. But when I do this AE will ad another keyframe to my mask path.
So what I really want to do is moving two vertexes from the original mask so that it won't effect the rest of the animation. I tried double clicking the mask and than edit it but this has the same effect.
Is it possible or do I have to delete all the keyframes, than edit the mask and animate it again?
Put your timeline cursor (CTI) on the exact Mask Path keyframe you want to change, then change your mask vertices. You'll be good. You may discover that you have to also tweak the keyframes on either side of your target keyframe, so just move the timeline cursor to them and tweak away.
If you put the timeline cursor any place else, AE will simply make a new keyframe, as you've discovered.
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