Coda and Voice Combining

[David Wynn]

Two issues popped up in my latest typesetting attempt (my second song ever).   Is there any way in lilypond to perform a D.S al Coda? (A working example is appreciated) Having trouble automatically combining two voices on the same staff.  Looking for additional working examples (the one in the lilypond manual was far too simplistic for useful modeling).   Thanks! David Wynn