Ok, I'm getting the hang of things a little better now.
Here's a tricky measure I'm working on. It has left hand fingerings
and a string number. I don't quite understand the behavior of the
string number. If I designate right or left, it goes next to the note
and on the staff. But if I put up or down, it goes off the staff. I
would like to designate down but have it go right below the not and on
the staff.
% measure 19:
<<
{ \set fingeringOrientations = #'(left) \set
stringNumberOrientations = #'(down)
r8 <e'-4\2>8 <g'-2> <e'-4> <g'-2>4 } \\
{ \set fingeringOrientations = #'(left) <e-1>2. }
>> \break