How to display a visual marker on the last overlay

Question

Is it possible to display a visual "marker" on the last overlay of every frame? I want to know when an overlay "ends" before I go to the next frame.

Answer 1

If I understand you correctly you could end each frame with

\only<.>{STOP here}

or some other marker as in the following where the . denotes the current value of the overlay counter at the end of the frame.

\documentclass[10pt,xcolor=dvipsnames]{beamer}

\begin{document}

\begin{frame}
  \begin{itemize}
    \item<+-> one
    \item<+-> two 
    \item<+-> three
  \end{itemize}

\only<.>{STOP here}
\end{frame}
\begin{frame}
  \begin{itemize}
    \item<+-> one one
    \item<+-> two two
    \item<+-> three three
  \end{itemize}

\only<.>{STOP here}
\end{frame}

\end{document}
\end{document}