To play back the contents of a Melody Window, first select the desired Melody Window using the Arrow Tool. You will see the play bar appear at the bottom of the motive.

When the play bar appears, either click on it directly or press the space bar on the keyboard to play the motive. Repeat either action to stop playback.

To start playback in any position other then the start of the motive, grab the play bar and drag it to the required starting position, then play.