move layers behind another in time (after effect)

[wadja86]

Hi,

I have a question about moving layers.

i have two layers A and B. the layer A is over B (based on layer index order).

after few seconds I need to move A behind B. 

I tried to use 3d axes and nothing happens. So please how do I do that?

[Dave Merchant · Accepted solution]

Layer stacking is fundamental to After Effects. You cannot make a layer jump in the stack at a certain time, so the only options are:

1. Duplicate the layer and trim the copies where you want the transition to be. This is a pain if the layer has a lot of interdependencies, but it's the only method that keeps everything in 2D space.
2. Set the layers you want to swap to 3D, and the composition to 3D, and animate their Z position value. This will introduce perspective changes as layers move with respect to the camera.

[wadja86]

thank you Dave, the first option worked perfectly !

thank you so much