# How to add an arrow and explanation to each term in an equation in beamer?

how to add an arrow and explanation to each term in an equation in beamer

\documentclass{article}
\usepackage{mathpazo}
\usepackage{pstricks,pst-node}
\begin{document}
\psset{nodesep=3pt}
\newrgbcolor{lila}{0.6 0.2 0.5}
\newrgbcolor{darkyellow}{1 0.9 0}
Die Bindungsenergie im Tröpfchenmodell setzt sich aus
folgenden Teilen zusammen:
\begin{itemize}
\item dem \rnode{b}{Oberflächenanteil}
\item Dem \rnode{a}{Volumenanteil},\$1cm] \def\xstrut{\vphantom{\frac{(A)^1}{(B)^1}}} $$E = \rnode[t]{ae}{\psframebox*[fillcolor=darkyellow,linestyle=none]{\xstrut a_vA}} + \rnode[t]{be}{\psframebox*[fillcolor=lightgray,linestyle=none]{\xstrut -a_fA^{2/3}}} + \rnode[t]{ce}{\psframebox*[fillcolor=green,linestyle=none]{\xstrut -a_c\frac{Z(Z-1)}{A^{1/3}}}} + \rnode[t]{de}{\psframebox*[fillcolor=cyan,linestyle=none]{\xstrut -a_s\frac{(A-2Z)^2}{A}}} + \rnode[t]{ee}{\psframebox*[fillcolor=yellow,linestyle=none]{\xstrut E_p}}$$\\[0.25cm] \item dem \rnode{c}{Coulomb-Anteil} \item der \rnode{d}{Symmetrieenergie} \item sowie einem \rnode{e}{Paarbildungsbeitrag}. \end{itemize} \nccurve[angleA=-90,angleB=90]{->}{a}{ae} \nccurve[angleB=45]{->}{b}{be} \nccurve[angleB=-90]{->}{c}{ce} \nccurve[angleB=-90]{->}{d}{de} \nccurve[angleB=-90]{->}{e}{ee} \end{document}  this is the output of node5.tex 2 • Hi, welcome to TeX.SE. A few more sentences in your question will help you get the answers that you're looking for. Have you tried anything? What engine (apparently not pdflatex. xelatex?) and packages (tikz? pstricks?) are you using besides beamer? Apr 13, 2011 at 9:49 • i'm not using any packages.don't know which package to use Apr 13, 2011 at 10:14 ## 2 Answers • works with pdflatex only Apr 13, 2011 at 9:31 • @user4852: The article says it requires pdflatex, but it works in xelatex as well. Apr 13, 2011 at 9:50 • @user4852: If you look at the comments on that link you'll see that it is claimed that it does work with the other backend drivers as well. Apr 13, 2011 at 9:50 Here is an example: http://tug.org/PSTricks/main.cgi?file=pst-node/nodes#text \documentclass{beamer} \usepackage{amsmath} \usepackage{pst-node} \psset{arrowscale=2,arrows=->} \def\VPh{\vphantom{\displaystyle\sum_{i=n}^m {i^2}}} \def\psBox#1#2{\psframebox[fillcolor=#1,fillstyle=solid]{\VPh\displaystyle#2}} \begin{document} \begin{frame}{Foo}{bar} \[ \only<1->{\rnode{t1}{\psBox{green!30}{\sum_{i=n}^m {i^2}}} +} \only<2->{\rnode{t2}{\psBox{blue!30}{\int_0^t \mathrm d\:\!\tau}} + \Gamma\bigl(n +\frac{1}{2}\bigr)+ } \only<3->{\rnode{t3}{\psBox{red!30}{\frac{1}{2}m\|\mathbf v\|^2}}}$

\begin{itemize}[<+->]
\item  Power \rnode[rc]{T1}{series} \nccurve[angleB=-75]{T1}{t1}
\item  Definite \rnode[rc]{T2}{integral}\nccurve[angleB=-90]{T2}{t2}
\item  Non-relativistic kinetic \rnode[rc]{T3}{energy}\nccurve[angleB=-90]{T3}{t3}
\end{itemize}
\end{frame}

\end{document}


• some packages are used,i can't find it Apr 13, 2011 at 9:18
• can't find what?
– user2478
Apr 13, 2011 at 9:36
• ps-tricks,pst-mode Apr 13, 2011 at 9:39
• these packages are part of any tex distribution ... However, you mean pstricks and pst-node
– user2478
Apr 13, 2011 at 9:47
• @user4852: These packages can be found on CTAN. Google "ctan pstricks" etc. Apr 13, 2011 at 9:52