I sorry this might be an easy question to answer but I've done a lot of search and have been unable to find a result that matches my query.
Basically I wondering if it is possible to change parameters for one keyframe on multiple layers. For example: I have a short animation where an image moves from the right side of the screen to the left (it's actually more complex than this but for the sake of example...). I then copied the parameters for this animation about five more layers with each layer beginning a few seconds after the last. Now - what I want to learn is a quick way to change the first keyframe for a particular transform for each layer, i.e orientation for keyframe 1 of each layer, then orientation for the last keyframe of each layer - so that continuity is kept.
I have tried playing with child parent layers but I need the objects to move together but independent of one another. Please let me know if I'm not being clear on anything.
To change the value of a keyframe, the timeline cursor has to be onthekeyframeinquestion. It can NOT be elsewhere on the timeline, or it will
simply create a new keyframe. So you have two options:
Move the footage on the timeline so all the keyframes line up, highlight the layers whose keyframe values you want to change, and change the value of just ONE of them. The rest also change to that same value.
Change the keyframe value of just one layer. Copy the keyframe. Move the timeline cursor to the corresponding keyframe on a different layer, highlight the keyframe and paste, thn repeat the process for as many layers as necessary.
I'm not in AE right now so I can't confirm this and may be wrong, but I'm pretty sure I recall correctly that, if you select the keyframes for a particular parameter on different layers and change one of them by dragging its value number to the left or right (instead of typing in a new value) the others change by the same amount. In other words, if twenty different layers have inpoint position keyframes with different values, you can put the playhead at the inpoint, select each layers' keyframe and drag the position value for one of them to move it by 100 pixels ... the others will also move 100 pixels (instead of all changing to the same value).
Note this adds to but doesn't contradict what Dave L. explained ... it only works if the keyframes are at the same timeline spot ... otherwise it'll just create new keyframes wherever the playhead is.
As I said, I can't confirm right now and there's sometimes a disconnect between what my fingers do instinctively while I'm working in AE and what my pea brain recalls so sorry if I'm wrong.
As long as your playhead is on the keyframe of the layer whose value you're changing, any keyframes you also have selected will change regardless of whether the playhead is on them without adding keyframes.
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