To turn off or on the metronome for playback or recording:
To specify whether the metronome should be on or off by default:
-- OR --
While holding down the CTRL key, click the metronome button in the toolbar.
Composer will display the Metronome Setup dialog box, as illustrated in Setting up the Metronome.
To specify how many measures and beats the metronome should lead in before the start of playback or recoding:
For more information, see Setting Up Pickup Beats.