[Tex/LaTex] Beamer highlight only a part in an itemize frame

beamerhighlightingitemize

How could I highlight only certain points in itemize environment. The examples I found here shows other parts also highlighted in the next slide. What I want is a single slide with one part highlighted and other blurred in the itemize environment.

Best Answer

You can use a TikZ \node and control the opacity using vopacity=`:

\documentclass{beamer}
\usepackage{tikz}

\begin{document}

\begin{frame}
\begin{itemize}
\item First item.
\item Second item.
\item Third item.
\tikz\node[opacity=0.2,align=left,inner xsep=0pt]
{%
  \parbox[t]{\linewidth}{%
  \item Fourth item.
  \item Fifth item.
  \item Sixth item.}%
};
\end{itemize}
\end{frame}

\end{document}

enter image description here

Notes:

The main portion of this code is form Highlight an equation within an align environment, so please up vote that answer instead -- my addition here is just the addition of the first optional parameter.

Code:

\documentclass{article}
\usepackage{calc}
\usepackage{amsmath}
\usepackage{xcolor}

\newlength\dlf
\newcommand\alignedbox[3][yellow]{
  % #1 = color (optional, defaults to yellow)
  % #2 = before alignment
  % #3 = after alignment
  &
  \begingroup
  \settowidth\dlf{$\displaystyle #2$}
  \addtolength\dlf{\fboxsep+\fboxrule}
  \hspace{-\dlf}
  \fcolorbox{red}{#1}{$\displaystyle #2 #3$}
  \endgroup
}

\begin{document}
\begin{align*}
    \alignedbox{a}{=b} &                        c  &= d \\
                c &= d & \alignedbox[magenta!20]{i}{=k} \\
                e &= f &                        g  &= h  
\end{align*}
\end{document}

[Tex/LaTex] Tikz beamer highlight different nodes in presentation using againframe

You can adapt this answer to How to make beamer overlays with Tikz node:

\tikzset{onslide/.code args={<#1>#2}{%
  \only<#1>{\pgfkeysalso{#2}} % \pgfkeysalso doesn't change the path
}}
\tikzset{alt/.code args={<#1>#2#3}{%
  \alt<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}} % \pgfkeysalso doesn't change the path
}}
\tikzset{temporal/.code args={<#1>#2#3#4}{%
  \temporal<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}{\pgfkeysalso{#4}} % \pgfkeysalso doesn't change the path
}}

This allows you to put for instance temporal=<overlay specification>{before}{during}{after} in the keyval list anywhere in a TikZ command. onslide works the same way with \only and I included \alt to round out the set.

Here is the complete code:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{positioning,arrows}
\usepackage{xcolor}

\definecolor{uablue}{RGB}{0,61,100}
\colorlet{uablue100}{uablue}
\colorlet{uablue75} {uablue!75!white}
\colorlet{uablue50} {uablue!50!white}
\colorlet{uablue25} {uablue!25!white}
\colorlet{uablue10} {uablue!10!white}
\colorlet{uablue5}  {uablue!5!white}

\definecolor{uared}{RGB}{126,0,47}
\colorlet{uared100}{uared}
\colorlet{uared75} {uared!75!white}
\colorlet{uared50} {uared!50!white}
\colorlet{uared25} {uared!25!white}
\colorlet{uared10} {uared!10!white}
\colorlet{uared5}  {uared!5!white}

\tikzset{onslide/.code args={<#1>#2}{%
  \only<#1>{\pgfkeysalso{#2}} % \pgfkeysalso doesn't change the path
}}
\tikzset{alt/.code args={<#1>#2#3}{%
  \alt<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}} % \pgfkeysalso doesn't change the path
}}
\tikzset{temporal/.code args={<#1>#2#3#4}{%
  \temporal<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}{\pgfkeysalso{#4}} % \pgfkeysalso doesn't change the path
}}

\begin{document}
\begin{frame}<1>[label=overview]
\frametitle{Overview}
\begin{figure}
\centering
\tikzstyle{block} = [rectangle, draw, fill=uablue25, 
    text width=4em, text centered, rounded corners, minimum height=2em, line width=1pt ]
\tikzstyle{line} = [line width=1pt, -triangle 45]
\tikzstyle{alert} = [text=uared100, fill=uared25, draw=uared100]
\tikzstyle{dim} = [text=uablue25, fill=uablue5, draw=uablue25]

\begin{tikzpicture}[node distance=1.5cm, auto]
    % Place nodes
    \node [block,onslide=<2->{dim}] (client) {Web Client};
    \node [block,onslide=<2->{dim}] (python) [right of=client, node distance=3cm] {Python Service};
    \node [block,onslide=<2->{dim}] (wavefront) [right of=python, node distance=3cm] {Wavefront};
    \node [block,onslide=<2->{dim}] (AMCL) [above of=wavefront] {AMCL};
    \node [block,temporal=<2>{}{alert}{dim}] (VFH) [below of=wavefront] {VFH};
    \node [block,onslide=<2->{dim}] (laser) [above right=0.5cm and 1.2cm of AMCL] {Laser};
    \node [block,onslide=<2->{dim}] (dash7) [right of=AMCL, node distance=3cm] {DASH7};
    \node [block,onslide=<2->{dim},temporal=<3>{}{alert}{dim}] (robot) [right of=wavefront, node distance=3cm] {Robot};
    % Draw edges
    \draw [line] (client.east) -> (python.west);
    \draw [line] (python) -> (client);
    \draw [line] (python) -- (wavefront);
    \draw [line] (AMCL) -- (wavefront);
    \draw [line] (AMCL) edge[out=180,in=90] (python);
    \draw [line] (python) edge[out=270,in=180] (VFH);
    \draw [line] (wavefront) -- (VFH);
    \draw [line] (laser) -> (AMCL);
    \draw [line] (dash7) -> (AMCL);
    \draw [line] (robot) -> (AMCL);
    \draw [line] (VFH) edge[out=0,in=270] (robot);
\end{tikzpicture}
\end{figure}
\end{frame}

\begin{frame}{Introductory stuff}
\begin{itemize}[<+->]
\item Stuff
\item Stuff
\item Stuff
\item Stuff
\end{itemize}
\end{frame}

\againframe<2>{overview}

\begin{frame}{Stuff about VFH}
\begin{itemize}[<+->]
\item Stuff
\item Stuff
\item Stuff
\item Stuff
\item Stuff
\end{itemize}
\end{frame}

\againframe<3>{overview}

\begin{frame}{Stuff about Robot}
\begin{itemize}[<+->]
\item Stuff
\item Stuff
\item Stuff
\end{itemize}
\end{frame}

\end{document}

sample code output

Best Answer

Related Solutions

[Tex/LaTex] Highlight an equation within an align environment with color option

Notes:

Code:

[Tex/LaTex] Tikz beamer highlight different nodes in presentation using againframe

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