"Order grobs from top to bottom, left to right, right to left"
" or bottom to top. For vertical alignments of staves, the"
" @code{break-system-details} of the left"
- " @internalsref{NonMusicalPaperColumn} may be set to tune"
+ " @rinternals{NonMusicalPaperColumn} may be set to tune"
" vertical spacing. Set @code{alignment-extra-space} to add"
" extra space for staves. Set"
" @code{fixed-alignment-extra-space} to force staves in"