Choose a sound from the toolbar or press keys 1-0 for first 10 sounds.
To set a note, click with the left mouse-button in the note area, hold the button and drag the mouse to position the note at the right place. Release the button at the proper position. The cursor will snap to even positions. If you want to set triplets, hold shift and the cursor will snap to odd positions.
To clear a note, click with the right mouse button on the note. To remove all notes from a measure doubleclick with the right mouse-button in the note-area of the measure.
To change the sound of a note. Select the new sound from the tool-bar and click with the left mouse-button on the old note.
To stress a note, click with the left mouse-button above the note. To unstress a note, click above the note again. To stress all opens or bass sounds in measures, select the measure and use the menu or toolbar buttons.