Imploding music is a way to merge several staves, but it will mostly be useful if all staves have the same rhythm.
If they don't, you could try to place each line in its own layer, like this :
Move the contents of staff 2 to layer 2 (see Edit menu : move/copy layers).
Then select layer 2 and "Show active layer only" (Documents menu).
Copy the contents of staff 2 and paste it into staff 1.
Deselect "Show active layer only".
got2go wrote:can one loop playback somehow without adding repeat to the score ?
I don't think it is possible, but maybe somebody has a trick that I don't know.
One compromise using the mouse : when you are using the playback window, you can always (during playback) click with the mouse on the extreme left button; playback will jump back instaneously to the beginning measure entered in that window.