Add text to absolute position in every slide automatically IN ADDITION to theme footer

Question

I know this sounds like a repeat question, but I'm pretty sure it's not.

I am trying to add text to an absolute position in every slide of the presentation, in addition to to content already provided by the theme I am using.

Right now, I have defined this command:

\usepackage{tikz}
\newcommand{\addtext}{
    \begin{tikzpicture}[remember picture,overlay]
        \node[yshift=1.5ex,anchor=south west] at (current page.south west)
        {\tiny My Added Text};
    \end{tikzpicture}

And then, in every slide I want to use it, I have to issue that command within the frame definition. The thing is, I want it in every slide, and requiring the user to remember to put it there is prone to forgetfulness.

I have seen a ton of examples here on how to add text to the footer that replaces the theme, or how to create commands like the one I've shared above. My question is, how do I either do something like that in every slide, or make that command a part of every slide automatically? I've tried adding that command to the frametitle using \addtobeamertheme, but it doesn't go well.

Ideas?

Answer 1

You can add to the footer without taking up space. Just add a picture of 0 dimension. Alternatively you can use package atbegshi.

\documentclass{beamer}

\addtobeamertemplate{footline}{%
  \setlength\unitlength{1ex}%
  \begin{picture}(0,0) 
    \put(1,4.5){\makebox(0,0)[bl]{\tiny My Added Text}}%
  \end{picture}%
}{}


\begin{document}

\begin{frame}
  \frametitle{Frame with Added Text}
  Text
\end{frame}


\end{document}