Click Start or press Enter on the keyboard to accept any tempo changes made.
Once started the plus and minus buttons will change tempo on the fly or you can manually change the number and press [Enter] to hear the new beat.
Click TAP to tap the tempo you would like to record with your keyboard.
You can use the Spacebar, Enter or any other key that normally produces output on your screen for tapping.
Tap at least 4 beats or until you get the tempo you like. Click Stop when you're done tapping and Start to hear the beat you tapped.
The metronome uses the last four beats that you tapped for the tempo and discards any previous beats you may have tapped.