oddHeaderMarkup

[Dimitri Sykias]

Lilypond v. “2.24.1”. I use “oddHeaderMarkup” and “evenHeaderMarkup”. I want to 
change the font size of header, but “\fontsize #-1.0” does nothing. How can I 
achieve this? Thanks!

oddHeaderMarkup = \markup
  \fill-line {
    " " 
    \on-the-fly #part-not-first-page \fontsize #-1.0 \fromproperty 
#'header:subtitle
    \if \should-print-page-number \fromproperty #'page:page-number-string
  }
  evenHeaderMarkup = \markup
  \fill-line { 
    \if \should-print-page-number \fromproperty #'page:page-number-string
    \on-the-fly #part-not-first-page \fontsize #-1.0 \fromproperty 
#'header:subtitle
    " "
  }