If you can see the other tracks in the list (in the quantise window) but they are greyed out and have no stars showing, drag the ‘star’ area to the right to make the stars appear and set the priority of each.
If you can see the other tracks in the list (in the quantise window) but they are greyed out and have no stars showing, drag the ‘star’ area to the right to make the stars appear and set the priority of each.