\input regression-test.tex
\DocumentMetadata{tagging=on,lang=de-DE}
\documentclass{ltx-talk}
\usepackage{ltxtalk-theme}

\ExplSyntaxOn
\RegisterLTXTalkTheme { role-test }
  {
    \ltxtalksetup { header = true, header-height = 3cm,
      footer = true, footer-height = 1cm }
    \defineltxtalkslot { rt-heading } { header } { custom }
      { role = heading, heading-level = 2 }
    \setltxtalkslotcontent { rt-heading } { A~Heading }
    \positionltxtalkslot { rt-heading } { 0pt } { 0pt } { \textwidth } { 0.5cm }
    \defineltxtalkslot { rt-note } { header } { custom } { role = note }
    \setltxtalkslotcontent { rt-note } { A~Note }
    \positionltxtalkslot { rt-note } { 0pt } { 0.5cm } { \textwidth } { 0.5cm }
    \defineltxtalkslot { rt-artifact } { header } { custom } { role = artifact }
    \setltxtalkslotcontent { rt-artifact } { An~Artifact }
    \positionltxtalkslot { rt-artifact } { 0pt } { 1cm } { \textwidth } { 0.5cm }
    \defineltxtalkslot { rt-nav } { header } { custom } { role = navigation }
    \setltxtalkslotcontent { rt-nav } { Nav~Chrome }
    \positionltxtalkslot { rt-nav } { 0pt } { 1.5cm } { \textwidth } { 0.5cm }
    \defineltxtalkslot { rt-content } { header } { custom } { role = content }
    \setltxtalkslotcontent { rt-content } { Plain~Content }
    \positionltxtalkslot { rt-content } { 0pt } { 2cm } { \textwidth } { 0.5cm }
    \defineltxtalkslot { rt-alt } { header } { custom }
      { role = artifact, alt-text = { A~decorative~mark } }
    \setltxtalkslotcontent { rt-alt } { *** }
    \positionltxtalkslot { rt-alt } { 0pt } { 2.5cm } { \textwidth } { 0.5cm }
    \defineltxtalkslot { rt-blank } { footer } { custom } { role = heading, heading-level = 3 }
    \setltxtalkslotcontent { rt-blank } { }
    \positionltxtalkslot { rt-blank } { 0pt } { 0pt } { \textwidth } { 1cm }
  }
\ExplSyntaxOn
\useltxtalktheme { role-test }
\ExplSyntaxOff

\title{Role-Test}
\author{A. Beispiel}
\date{\today}

\begin{document}
\START

\begin{frame}
  \frametitle{Egal}
\end{frame}

\clearpage
\SHOWPDFTAGS

\end{document}