You can play a project any time you’re working on it, in order to hear your latest changes. When you play a project, playback starts from the current position of the playhead. If Cycle mode is turned on, playback starts from the beginning of the cycle area.
Click the Play button in the control bar (or press the Space bar).
While the project is playing, the Go to Beginning button in the control bar becomes a Stop button.
Click the Stop button in the control bar (or press the Space bar).
For more information about project playback, see Control playback with the transport buttons.