[Tex/LaTex] How replace beamer graphics by itemize

beameroverlays

In a Beamer frame with two "pages" (the second one appearing after mouse click) I have:

On first page an itemize environment with 3 \item followed by a picture added with includegraphics
On second page the same itemize environment with the same 3 \item and I want to replace the picture by a 4th \item

My problem is about how keep the same position and size of all elements in the two pages. I am able to replace my graphics by a 4th item using <1> on the include graphics and <2> on the 4th itemize but the layout of the frame changes between the two pages. How can I avoid that ?

Best Answer

You can use \overlayarea:

\overlayarea{<width>}{<height>}

A simple example:

\documentclass{beamer}

\begin{document}

\begin{frame}

\begin{overlayarea}{\textwidth}{6cm}
\begin{itemize}
\item<1-> First item.
\item<1-> Second item.
\item<1-> Third item.

\only<1>{\includegraphics[height=4cm]{example-image-a}}
\item<2> Fourth item.
\end{itemize}
\end{overlayarea}
\end{frame}

\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Can one replace bullet points with graphics

Simply replace the mentioned LaTeX commands with \includegraphics[<options>]{<image>} (graphicx package). You can adjust the scale or height of the images using the scale and height option, receptively. Using either ex or em as unit for the height will scale the image depending on the font size.

For beamer you do it the following way (See also Change bullet style / formatting in Beamer)

\documentclass{beamer}

\usepackage{graphicx}

\defbeamertemplate{itemize item}{image}{\small\includegraphics[height=1.6ex]{myimage}}
\defbeamertemplate{itemize subitem}{image}{\scriptsize\includegraphics[height=1.6ex]{myimage}}
\defbeamertemplate{itemize subsubitem}{image}{\tiny\includegraphics[height=1.6ex]{myimage}}

\setbeamertemplate{itemize item}[image]
\setbeamertemplate{itemize subitem}[image]
\setbeamertemplate{itemize subsubitem}[image]

\begin{document}

\begin{frame}{Example}

\begin{itemize}
    \item A
    \item B
    \item C
    \begin{itemize}
        \item A
        \item B
        \item C
        \begin{itemize}
            \item A
            \item B
            \item C
        \end{itemize}
    \end{itemize}
\end{itemize}

\end{frame}

\end{document}

For the normal itemize you can redefine \labelitemi, \labelitemii, \labelitemiii and \labelitemiv for the four possible nesting levels.

If you want to have different images for different items you should simply define macros which call \item with the optional argument as described by me in How to define a list with custom symbols?.

For images this would look e.g. like this:

\newcommand*\tick{\item[\includegraphics[height=1.6ex]{tickimg}]}
\newcommand*\fail{\item[\includegraphics[height=1.6ex]{failimg}]}

[Tex/LaTex] Beamer keeping line position constant on itemize

One possibility with overlayarea:

\documentclass{beamer}
\usepackage{tikz}

\begin{document}

\begin{frame}
  \begin{overlayarea}{\textwidth}{.6\textheight}
    \begin{itemize}[<+->]
    \item <1-> Poisson Boltzman equation (PB)
    \item <2-> Debye-H\"uckle equation  (DH)
    \item <3-> The naive approach - applying (DH) equation to PE
    \end{itemize}
  \begin{tikzpicture}
    \node at (0,0) {};
        \node<1,2> [text width = 20cm]at (10.5,-1) {$ \nabla^2 \phi =\sum_i \frac{n_i q_i\text{e}^{-q_i \phi/kT}}{4 \pi \epsilon}$};
        \node <2> [text width = 20cm]at (10.5,-2) {$q_i \phi/kT \ll 1 \Rightarrow \nabla^2 \phi \simeq \kappa^2 \phi$};
        \node <2> [text width = 20cm, font=\footnotesize]at (10.5,-2.5) {$\kappa^2 = \lambda^{-1/2} =  \sum_i \frac{n_i q_i}{4 \pi \epsilon}$};
        \node <3> [text width = 20cm] at(10.5,-1) {$\frac{F_{el}}{VkT} = - \left ( \frac{ 4 \pi e^2}{\epsilon kT}
    \sum_{i=1} n_i z_i^2 \right )^{3/2} \left ( 12 \pi \right )^{-1}$};
  \end{tikzpicture}
  \end{overlayarea}

\end{frame}

\end{document}

enter image description here

By the way, your syntax for overprint is wrong; the width should be declared as an optional argument:

\begin{overprint}[<width>]
...
\end{overprint}

Best Answer

Related Solutions

[Tex/LaTex] Can one replace bullet points with graphics

[Tex/LaTex] Beamer keeping line position constant on itemize

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