5 As a last resort, the placement of grobs can be adjusted manually, by
6 setting the @code{extra-offset} of a grob.
12 \outputproperty #(make-type-checker 'note-head-interface)
13 #'extra-offset = #'(2 . 3)
17 \outputproperty #(make-type-checker 'mark-interface)
18 #'extra-offset = #'(-1 . 4)