Expanding on Werner’s example a bit, is this something like what you’re after?
\version "2.25.12"
\markup \with-dimensions #'(0 . 0) #'(0 . 0) {
\translate #'(20 . -20)
\center-column { example-text \concat { \arrow-head #X #LEFT ##t \draw-line
#'(30 . 0) \arrow-head #X #RIGHT ##t }}}
<<
{ f'2 f' f' f' f'1 }
{ d'2 d' d' d' d'1 }
>>
\paper {
markup-markup-spacing.basic-distance = 0
markup-markup-spacing.minimum-distance = 0
markup-markup-spacing.padding = 0
markup-system-spacing.basic-distance = 0
markup-system-spacing.minimum-distance = 0
markup-system-spacing.padding = 0
top-markup-spacing.basic-distance = 0
top-markup-spacing.minimum-distance = 0
top-markup-spacing.padding = 0
}
> 3 juni 2024 kl. 13:43 skrev Paolo Prete <paolopr...@gmail.com>:
>
> Thanks to Torsten and Werner,
>
> I'm going to use the postscript approach.
>
> But what about the segment with arrows and centered text?
>
> I googled a bit, and I also queried ChtaGPT but could not find anything
> useful...
>
>
> On Mon, Jun 3, 2024 at 11:46 AM Torsten Krueger <tors...@kryger.de> wrote:
> Paolo Prete wrote on 02.06.2024:
>
> > How can I draw a vertical (or even diagonal) line independently positioned
> > from the notes in the score, that can span across staves, as shown in the
> > figure?
>
> For drawing lines independently from notes I do not use Lilypond
> directly but postscript. For this purpose I have added a few lines of
> code right at the beginning in the definition of bookTitleMarkup like
> this (drawing two small horizontal lines in the page margins):
>
> --8<---------------cut here---------------start------------->8---
>
> bookTitleMarkup = \markup {
> \column {
> \postscript #"
> gsave
> initmatrix
> 1 setlinewidth 0 306 moveto 6 0 rlineto stroke
> 1 setlinewidth 377 306 moveto 6 0 rlineto stroke
> grestore"
> \fill-line {
> \fromproperty #'header:instrument
> ...
>
> --8<---------------cut here---------------end--------------->8---
>
> Don't know if it helps in your case, but maybe gives you an idea of how
> to proceed.
>
> Have fun
> Torsten
>
>
