I have a beamer theme in a .sty file, and I want to make a command \supervisor that works like \author.

In the .sty file, I added the following:



But in the main file, when I declare \supervisor{Someone}, before \begin{document}, just like \author and \title etc, I get the error "Missing: begin document". The text then appears at the top of the titlepage, without the fontsize and colour that I assigned to supervisor.

How should I correctly declare this command such that it works like author for example? (I cannot find how \author is actually defined for beamer).

  • Welcome to TeX.SX! \author works in another way: it does something like \newcommand{\author}[1]{\def\@author{#1}} and then you could refer to the value by calling \@author. – TeXnician Sep 8 '18 at 10:17

The trick is to define a new command \insertsupervisor inside \supervisor



\supervisor{Foo bar}




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