By default, the Timeline appears at the top of the main application window, above the Stage. To change its position, detach the Timeline from the Stage and float it in its own window or dock it to any other panel you choose. You can also hide the Timeline.
To change the number of layers and frames that are visible, resize the Timeline. To view additional layers when the Timeline contains more layers than can be displayed, use the scroll bars on the right side of the Timeline.

Resize the Timeline