Continuous Loop playback can be toggled on or off by clicking the 'Loop' icon at the centre of the toolbar, using the ‘Loop’ function in the 'Navigate' menu, or the shortcut ⌘L.

You can also Loop sections of the timeline by setting In and Out Points.

In and Out Points can be set to define the start and end of a looped section.

And they can be set in the ‘Navigate’ menu, or via the shortcut keys I (set In point), O (set Out point) and C (Clear in/out points).

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