• Chords and extensions: select the chords and extensions you want to use (green color indicates selection).
• Clef: select the clef to use.
• Retry in case of error: select if you want to be able to retry if you make an error.
• Stop after: select to stop the exercise after a certain number of minutes or exercises.
• Answer in: limits the time you have to answer.
• Click OK to start the exercise or press Enter/Return.

Build the chord by clicking on the corresponding note buttons.