\documentclass[14pt, a4paper]{memoir}
\usepackage[british,latin]{babel}
\usepackage{fontspec}
\defaultfontfeatures{Ligatures=TeX}
\setmainfont{Linux Libertine O}
\usepackage[cm]{fullpage}
\usepackage{color}
\usepackage[autocompile]{gregoriotex}

\makepagestyle{plain}
\makeevenfoot{plain}{}{\small (Veronica Brandt http://www.brandt.id.au)}{}
%\makeoddfoot{plain}{}{\small (Veronica Brandt http://www.brandt.id.au)}{}

\pagestyle{plain}

\begin{document}

%\begin{center}\begin{huge}\textsc{Proclamation of Moveable Feasts}\end{huge}\end{center}
\begin{center}%\begin{huge}
\textsc{\large De publicatione Festorum mobilium}%\end{huge}

%(with Corpus et Sanguinis Christi transferred)
\end{center}

\grechangestaffsize{18}

\grechangedim{spaceabovelines}{0.5cm}{scalable}
\grechangedim{commentaryseparation}{0.05 cm}{scalable}%
\grechangedim{commentaryraise}{0.3 cm}{scalable}%

\gresetlinecolor{red}

\greannotation{\small \textsc{\textbf{III}}}
\grecommentary{{\small \emph{Epiphania 2025}}}
\gregorioscore{proc2025}


{\footnotesize 
\noindent }
\end{document}
