The Timeline organizes and controls a movie's content over time in layers and frames. The most important components of the Timeline are frames, layers, and the playhead.
You can control the Timeline by changing the display of frames and by dragging it from the main application window, separating it into its own window, or by docking the Timeline to any side of the application window.
When there are more layers than can be displayed in the Timeline, scroll bars are available to the right of the layer time strips. You also can resize the Timeline and layers.
To move the Timeline:
Drag from or double-click the area above the time ruler. Drag the Timeline window to the edge of the application window to dock it. Press Control to prevent the Timeline from docking.
To lengthen or shorten name fields:
Drag the bar separating the layer names and the Timeline.
To increase or decrease the number of layers displayed when the Timeline is docked:
Drag the bar separating the Timeline from the Stage area.