Emu XL-7 & MP-7 User's Group

Hi people.
Just got an XL7, very neat machine. 

Looked through the manual but couldn't find info on how to enter an
end of song mark or Stop after doing a realtime recording in song mode
(recording external keyboard midi). Seems pretty clear how you enter a
STOP if using step mode.

So how do I stop the song track playing back beyond the, say, 40 bars
of the recording ? 

Thanks
APK