Creating interactive slide (beamer)

Question

I want to create an interactive slide, which will have two parts:

In the left side, some comments will be given in enumerate environment (one will be highlighted at each overlay)
In the right side, an image will accompany the currently highlighted text (say, an arrow will be shown in that image)

For example, have a look at frame numbered 23 of this file.

Screen-shot:

What is the best way to do this?

As per asked, this is (a short version of) what I am trying...

MWE

\documentclass{beamer}

\begin{document}
\begin{frame}
\begin{minipage}{0.2\textwidth}
\begin{enumerate}
\item this is 1
\item this is 2
\end{enumerate}
\end{minipage}
\hfill
\begin{minipage}{0.75\textwidth}
\only<1> {\includegraphics[width=.75\textwidth]{fig4-2}}
\only<2> {\includegraphics[width=.75\textwidth]{fig4-3}}
\end{minipage}
\end{frame}
\end{document}

The images are:

fig4-2

fig4-3

Update

As @GonzaloMedina replies on the left-hand-side part (that solves my current problem), now I am left with dynamically creating the images. That means, rather than creating each image separately and then including is a tiresome and monotonous job. There should be some better way to reproduce one image from its predecessor. To complete the whole question, as per his (Gonzalo Medina) suggestion, I am creating this follow-up question.

Please provide a Minimum Working Example rather than expecting people to start creating things from scratch! — cfr, Aug 09 '14 at 13:31
@cfr My attempt is very basic. Just create separate images and use \pause for including each image. I think it will be to naive for the expert latex-ians. — hola, Aug 09 '14 at 13:35
So? It still saves people having to start with \documentclass.... Note that it matters what the images are, for example. Code shows people what you are trying to do in a way which your question does not at the moment. (If the image is created on-the-fly, that's different than if it is included as an external file.) Moreover, you can set up an MWE using example images which saves people having to do that part of the work. — cfr, Aug 09 '14 at 13:39
@cfr OK, I am adding it. But I cannot post the actual images, so give me some time to make some edits. — hola, Aug 09 '14 at 13:42
Excellent. Note that the mwe package provides sample images for this purpose which you can just use \includegraphics{example-image-a} or whatever. That way, you don't need to post images. — cfr, Aug 09 '14 at 13:58

Gonzalo Medina · Accepted Answer · 2014-08-09T17:36:19.747

Here's one way to do it:

enter image description here

The code:

    \documentclass{beamer}
    \usepackage{tikz}
    \usetikzlibrary{tikzmark}

    \newcounter{tmp}
    \newcommand<>\Highlight[1]{%
    \stepcounter{tmp}%
    \only#2{\begin{tikzpicture}[remember picture,overlay]
    \fill[green!60!black,opacity=0.5] 
      ([xshift=-.2em,yshift=2ex]pic cs:start-\thetmp)
        rectangle  
      ([xshift=.2em,yshift=-1ex]pic cs:end-\thetmp);
    \end{tikzpicture}}%
    \tikzmark{start-\thetmp}#1\tikzmark{end-\thetmp}%
    }

    \begin{document}

    \begin{frame}

    \begin{minipage}{0.2\textwidth}
    \begin{enumerate}
    \item \Highlight<+>{this is 1}
    \item \Highlight<+>{this is 2}
    \item \Highlight<+>{this is 3}
    \item \Highlight<+>{this is 4}
    \item \Highlight<+>{this is 5}
    \end{enumerate}
    \end{minipage}
    \hfill
    \begin{minipage}{0.75\textwidth}
    \only<1> {\includegraphics[width=.75\textwidth]{fig4-2}}
    \only<2> {\includegraphics[width=.75\textwidth]{fig4-3}}
    \only<3> {\includegraphics[width=.75\textwidth,height=0.7cm]{example-image-a}}
    \only<4> {\includegraphics[width=.75\textwidth,height=0.7cm]{example-image-b}}
    \only<5> {\includegraphics[width=.75\textwidth,height=0.7cm]{example-image-c}}
    \end{minipage}
    \end{frame}

    \end{document}

Using the tikzmark library, the \Highlight command places a colorized rectangle in the background. I assumed here that the text to be highlighted spans no more than a line; otherwise, a modification on the definition will be required; for example,

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{tikzmark}

\newcounter{tmp}
\newcommand<>\Highlight[1]{%
\stepcounter{tmp}%
\only#2{\begin{tikzpicture}[remember picture,overlay]
\fill[green!60!black,opacity=0.5] 
  ([xshift=-.2em,yshift=2ex]pic cs:start-\thetmp)
    rectangle  
  ([xshift=.2em,yshift=-1ex]pic cs:end-\thetmp);
\end{tikzpicture}}%
\tikzmark{start-\thetmp}#1\hfill\tikzmark{end-\thetmp}%
}

\begin{document}

\begin{frame}

\begin{minipage}{0.3\textwidth}
\begin{enumerate}
\item \Highlight<+>{this is 1 and some other text}
\item \Highlight<+>{this is 2}
\item \Highlight<+>{this is 3}
\item \Highlight<+>{this is 4}
\item \Highlight<+>{this is 5}
\end{enumerate}
\end{minipage}
\hfill
\begin{minipage}{0.65\textwidth}
\only<1> {\includegraphics[width=\linewidth]{fig4-2}}
\only<2> {\includegraphics[width=\linewidth]{fig4-3}}
\only<3> {\includegraphics[width=\linewidth,height=0.7cm]{example-image-a}}
\only<4> {\includegraphics[width=\linewidth,height=0.7cm]{example-image-b}}
\only<5> {\includegraphics[width=\linewidth,height=0.7cm]{example-image-c}}
\end{minipage}
\end{frame}

\end{document}

enter image description here

The code needs two or thee runs to stabilize.

Just an off-topic question: How did you create the animation? — hola, Aug 09 '14 at 17:15
@pushpen.paul Using ImageMagick; the procedure is described in http://tex.stackexchange.com/a/23728/3954. — Gonzalo Medina, Aug 09 '14 at 17:20
Thanks. For the present situation, my problem is solved (as I have already created the images in separate files). Now, for future reference, I need help for creating images on the fly (tikzpicture embedded in one tex file). Should I update this question or create a follow up question? — hola, Aug 09 '14 at 17:45
@pushpen.paul A follow-up one seems the best choice since the new issue is apparently independent from the issue discussed here. — Gonzalo Medina, Aug 09 '14 at 17:51

Creating interactive slide (beamer)

Update

1 Answers1

Linked