Alt+Up/Down select jumps between staves to find next lowest note
1. Create a new score with a piano part
2. Insert a quarter note chord consisting of middle C and the G above it on the treble clef, and then insert a quarter note E above middle C in the bass clef
3. Select the G in the treble clef and press Alt+Down
The C in the treble clef should now be selected
The E in the bass clef is selected. Pressing Alt+Down again jumps to the treble clef again.
r2908 on GNU/Linux