Question about @lilypond options for creating smaller page examples within our Doc

[James Lowe]

Hello,

While editing the NR 3.2 section on Titles and Headers it seems it would be 
nice to be able to create 'smaller' (or rather, shorter) ' whole page output' 
when processing @lilypond examples, so as to show simple things like page 
breaks, tag lines and headers and footers without having to display a whole 
Letter/A4 page of blank space.

I've takne a look in the usage documents for lilypond-book and Texinfo but I 
need some advice.

It seems to me that I cannot create an explicit output size by  specifying  
height and width dimensions, like I can specify a line length within a 
@lilypond [xxx] variable.

So I thought that if we had a 'custom' entry in the scm/paper.scm file - I 
experimented with some sizes and it seems that having a height of 35mm is 
enough to get a line of music, a header/title and a footer - that we could 
simply refer to that within the @lilypond [xxx] variables. But I cannot see 
what option to use or if it is possible.

I could just explicitly put a \paper {} variable within the @lilypond construct 
but this isn't as neat and I can't see which option to use in the @lilypond 
[xxx] variable to force it to use the \paper {} either.

Thanks for your help.

James

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