[Tex/LaTex] Beamer – gradual exposure in the same frame

beameroverlays

I want to reveal gradually several items in the same frame in a certain order. In the following MWE I want to reveal item 1 (make item 1 appear first), then reveal table 1, then reveal item 2, then reveal table 2.

How can I do that?

\documentclass{beamer}

\begin{document}
    \begin{frame}
        \begin{itemize}
            \item 
            item 1

            \item 
            item 2
        \end{itemize}

        \vspace{1.5\baselineskip}

        \begin{minipage}{0.4\textwidth}
            \begin{tabular}{c|c}
                table1 & trial \\
                \hline
                \hline
                1 & 2 \\
                3 & 4
            \end{tabular}
        \end{minipage} \qquad
        \begin{minipage}{0.4\textwidth}
            \begin{tabular}{c|c}
                table2 & trial \\
                \hline
                \hline
                5 & 6 \\
                7 & 8
            \end{tabular}
        \end{minipage}  

    \end{frame}
\end{document}

Best Answer

You can use the \visible<overlay>{<stuff>} specification:

enter image description here

\documentclass{beamer}% http://ctan.org/pkg/beamer
\begin{document}
\begin{frame}
  \begin{itemize}
    \item \visible<1->{item 1}
    \item \visible<3->{item 2}
  \end{itemize}

  \vspace{1.5\baselineskip}

  \visible<2->{\begin{minipage}{0.4\textwidth}
    \begin{tabular}{c|c}
      table1 & trial \\
      \hline \hline
      1 & 2 \\
      3 & 4
    \end{tabular}
  \end{minipage}} \qquad
  \visible<4->{\begin{minipage}{0.4\textwidth}
    \begin{tabular}{c|c}
      table2 & trial \\
      \hline \hline
      5 & 6 \\
      7 & 8
    \end{tabular}
  \end{minipage}}
\end{frame}
\end{document}

The overlay <2-> means that the item will be visible from slide 2 onward, for example.

Related Solutions

[Tex/LaTex] \pause and \framebreak in the same frame

As Daniel mentioned in his answer, it's not possible to use frame breaks and overlay specifications; however, using a beamercolorbox (or an appropriate variant, depending on the theme used) you can define a new environment that behaves as the proof environment, except for the title, and then you can use this new environment to write the successive parts of your proof in different frames (or in different slides of the same frame).

Below there's an example showing both approaches for the Berkeley theme (other themes will require a modification of the box used for the continuation of the proof). Locally redefining \qedsymbol you can prevent the symbol from appearing on the first frame/slide and then using \qed you can typeset the symbol one the proof is finished:

\documentclass{beamer}
\usetheme{Berkeley}
\usepackage{lipsum}% just to generate filler text

\setbeamercolor{proofblock}{use=block body,bg=block body.bg}

\newenvironment<>{proofc}[1]
  {\begin{actionenv}#2%
    \begin{beamercolorbox}[sep=1ex]{proofblock}#1%
  }
  {\end{beamercolorbox}\end{actionenv}}

\begin{document}

\begin{frame}
\def\qedsymbol{} % temporarily suppress the \qedsymbol
\frametitle{Proof of the main result}
\begin{proof}
\lipsum*[2]
\end{proof}
\end{frame}

\begin{frame}
\frametitle{Proof of the main result (Cont.)}
\begin{proofc}
\lipsum*[2]
\end{proofc}
\end{frame}

\begin{frame}
\frametitle{Proof of the main result (Cont.)}
\begin{proofc}
\lipsum*[4]\qed
\end{proofc}
\end{frame}

\begin{frame}
\only<1>{
\def\qedsymbol{} % temporarily suppress the \qedsymbol
\frametitle{Proof of the main result}
\begin{proof}
\lipsum*[2]
\end{proof}
}
\only<2>{
\frametitle{Proof of the main result (Cont.)}
\begin{proofc}
\lipsum*[2]
\end{proofc}
}
\only<3>{
\frametitle{Proof of the main result (Cont.)}
\begin{proofc}
\lipsum*[4]\qed
\end{proofc}
}
\end{frame}

\end{document}

Some images showing the result:

enter image description here

Now that the original question has been edited, the solution is simpler since no block is used in the customized myproof environment:

Begin and end the myproof environment in every frame.
Locally redefine \qedsymbol for those frames in which the proof isn't yet finished.
Use the myproofc environment for those frames not needing the title.

A complete example using the code snippet given:

\documentclass{beamer}
\usetheme{Luebeck}  
\usecolortheme{beaver}

\newenvironment{myproof}[1][\proofname]{%  
  \par\def\insertproofname{#1{.}}%
  \pushQED{\qed}\alert{\textbf{{\insertproofname}}} \hspace*{\fill} \\[5pt]}
  {\popQED}

\newenvironment{myproofc}[1][\proofname]{%  
  \par%
  \pushQED{\qed}}
  {\popQED}

\begin{document}

\frame{
\def\qedsymbol{}
\frametitle{(1) Rate function}
\begin{myproof}
 \begin{itemize}
 \item[(i)]
 \vspace*{7pt}
 By definition of $I(\cdot)$ we have 
 \[
   text
 \] 
 \pause
 \[
  ...
 \].
 \end{itemize}
\end{myproof}
}

\frame{
\frametitle{(1) Rate function}
\begin{myproofc}
\begin{itemize}
\item[(ii)]
  ...
 \pause
 \vspace*{10pt}
\item[(iii)] 
...
 \end{itemize}
\end{myproofc}
} 

\end{document}

[Tex/LaTex] Beamer frame: adding something to the last slide

The eframe environment defined below works just like a normal frame but appends (END) on the last slide of that frame.

This solution rests on mainly two tricks:

accessing the value of the beamerpauses counter (which, at a given point of a frame environment, contains the number of overlay specifications used so far in that frame) only at the very end of the environment, in order to get the total number of overlay specifications in that frame; and
Joseph Wright's solution for programmatically changing the frame title mid frame.

You can easily redefined the eframe environment to suit your needs.

enter image description here

\documentclass{beamer}

\makeatletter
\newcommand*{\augmentframetitle}[1]
{%
    \expandafter\frametitle\expandafter%
    {\beamer@frametitle #1}%
}
\makeatother

\newenvironment{eframe}
{%
    \begin{frame}
}{%
    \augmentframetitle{\ \onslide<\value{beamerpauses}>{(END)}}         
    \end{frame}
}

\begin{document}
    \begin{eframe}
    \frametitle{My last topic}
        foo\\
        \pause
        bar
    \end{eframe}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] \pause and \framebreak in the same frame

[Tex/LaTex] Beamer frame: adding something to the last slide

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