Layers on a timeline — images, text and shapes, each with its own motion.
Drag a layer on the stage to move it, corners to resize, the handle above it to rotate. On the timeline drag a bar to move it in time, its ends to trim; the striped parts are the entrance and exit. Click the ruler to scrub. Space play · Del delete · Ctrl Z undo · Ctrl D duplicate · arrows nudge.
The entrance plays from the layer's start, the exit finishes at its end, and the loop runs in between (and underneath both). Lightning loops strike this layer.