From all screens:

To get to: | Do:
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A listing of all leaders | Click the Leader:Index button or press F3
Details for a known leader | Click the Leader:Search button, or press F2 to enter their name
A listing of all musicians | Click the Musician:Index button or press F7
Details for known musician | Click the Musician:Search button or press F6 to enter their name
A listing of all tunes | Click the Tune:Index button or press F11
Details for known tune | Click the Tune:Search button or press F9 to enter it's name
Back to the screen you came from | Click on the Back button