This is very easy.
Put the track you’re going to shrink back/down on Track V2.
Put track to be revealed on Track V1.
Double click V2 vid and set keyframe for position and scale, move cursor
down 20 frames or 40 or whatever time you want the shrink to happen.
Scale down and position vid. This will create new keyframes for you auto.
I would suggest you read thru the manual as this is very basic stuff.
Chris Tompkins
Video Atlanta LLC