带颜色覆盖的 Beamer 笔记

Question

我在使用旁注时遇到了 beamer 的叠加系统问题。我有一张带有叠加规范的幻灯片，并且我为这张幻灯片的每个阶段都做了一些注释。例如，来自 beamer 文档：

\documentclass[compress,mathserif]{beamer}
\usepackage{pgfpages}
\usetheme{Frankfurt}
\setbeameroption{show notes}
\setbeameroption{show notes on second screen=right}

\begin{document}
\begin{frame}
  \frametitle{There Is No Largest Prime Number}
  \framesubtitle{The proof uses \textit{reductio ad absurdum}.}
  \begin{theorem}
    There is no largest prime number.
  \end{theorem}
  \begin{proof}
    \begin{enumerate}
    \item<1-| alert@1> Suppose $p$ were the largest prime number.
    \item<2-> Let $q$ be the product of the first $p$ numbers.
    \item<3-> Then $q+1$ is not divisible by any of them.
    \item<1-> Thus $q+1$ is also prime and greater than $p$.\qedhere
    \end{enumerate}
  \end{proof}
  \note<1->{ note one\\ }
  \note<2->{ note 2\\ }
  \note<3->{ note 3\\ }
  \note<4->{ note 4\\ }
\end{frame}
\end{document}\endinput

在这个例子中，注释随着覆盖的推进而出现。我希望笔记始终可见，但在相应的幻灯片中以某种方式突出显示（例如以红色）。 我尝试过\note<1-| alert@1>，但是没有效果，所以看来我对覆盖有一些误解。

Answer 1

您可以使用\alt{}{}为笔记着色：

\documentclass[compress,mathserif]{beamer}
\usepackage{pgfpages}
\usetheme{Frankfurt}
\setbeameroption{show notes}
\setbeameroption{show notes on second screen=right}

\newcommand<>{\mynote}[1]{%
    \alt#2{%
        \note{\textcolor{red}{#1}}
    }
    {%
        \note{#1}
    }
}

\begin{document}
\begin{frame}
  \frametitle{There Is No Largest Prime Number}
  \framesubtitle{The proof uses \textit{reductio ad absurdum}.}
  \begin{theorem}
    There is no largest prime number.
  \end{theorem}
  \begin{proof}
    \begin{enumerate}
    \item<1-| alert@1> Suppose $p$ were the largest prime number.
    \item<2-> Let $q$ be the product of the first $p$ numbers.
    \item<3-> Then $q+1$ is not divisible by any of them.
    \item<1-> Thus $q+1$ is also prime and greater than $p$.\qedhere
    \end{enumerate}
  \end{proof}
  \mynote<1>{note one\\}
  \mynote<2>{ note 2\\ }
  \mynote<3>{ note 3\\ }
  \mynote<1>{ note 4\\ }
\end{frame}
\end{document}