Notice that the slur is beneath the grace note. However, Lilypond insists on putting the slur above:
In voice one for the bar in question I have:
\acciaccatura d8( -4 <c a>4) -2 -1 <g b>4 e4 \rest |
and in the second voice I have:
I've tried (and failed) to find something like this in the manual and the snippets.Is it possible to move the slur?