4.6.1 Displaying spacing

To graphically display the dimensions of vertical properties that may be altered for page formatting, set annotate-spacing in the \paper block, like this:

#(set-default-paper-size "a6" 'landscape)
\book {
  \score { { c4 } }
  \paper { annotate-spacing = ##t }
}

Some unit dimensions are measured in staff spaces, while others are measured in millimeters. The pairs (a,b) are intervals, where a is the lower edge and b the upper edge of the interval.