[Tex/LaTex] beamer box around equations

beamergraphics

enter image description here

How can I make a fancy box around equations like the one in the left?
I tried many time on my own but nothing satisfactory obtained!

Best Answer

Here are some options with empheq and tcolorbox adopting code from this answer.

\documentclass{article}
\usepackage[svgnames,hyperref]{xcolor}
\usepackage{empheq}
\usepackage[many]{tcolorbox}
%\tcbuselibrary{skins}

\tcbset{highlight math style={enhanced,
  colframe=red!60!black,colback=yellow!50!white,arc=4pt,boxrule=1pt,
  }}

\newtcbox{\mybox}[1][]{nobeforeafter,math upper,tcbox raise base,
  enhanced,frame hidden,boxrule=0pt,interior style={top color=green!10!white,
  bottom color=green!10!white,middle color=green!50!yellow},
  fuzzy halo=1pt with green,drop large lifted shadow,#1}

\begin{document}

\begin{empheq}[box=\tcbhighmath]{align}
a&=b\\
E&=mc^2 + \int_a^a x\, dx
\end{empheq}

\begin{empheq}[box={\tcbhighmath[colback=blue!20!white,arc=0pt,outer arc=0pt,toprule=0pt,drop large lifted shadow]}]{align}
a&=b\\
E&=mc^2 + \int_a^a x\, dx
\end{empheq}

\begin{empheq}[box=\mybox]{align}
a&=b\\
E&=mc^2 + \int_a^a x\, dx
\end{empheq}

\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Title in box in Beamer presentation

You can redefine the title page template and introduce the necessary modifications for the layout; this redefinition is needed since both the title and the subtitle are, by deafult, inside the same beamercolorbox so simply redefining the title beamer color would produce a box around both title and subtitle (which is not wanted here):

\documentclass{beamer}

\title{TITLE}
\titlegraphic{\includegraphics[height=4cm]{cat}}
\subtitle{\textbf{Subtitle}}
\author{Author}

\setbeamercolor{title}{bg=orange,fg=white}

\makeatletter
\setbeamertemplate{title page}
{
  \vbox{}
  \vfill
  \begin{centering}
    \begin{beamercolorbox}[sep=8pt,center]{title}
      \usebeamerfont{title}\inserttitle
    \end{beamercolorbox}
    \setbeamercolor{title}{bg=white,fg=structure}
    \begin{beamercolorbox}[sep=8pt,center]{title}
      {\usebeamercolor[fg]{titlegraphic}\inserttitlegraphic\par}
      \ifx\insertsubtitle\@empty%
      \else%
        \vskip0.25em%
        {\usebeamerfont{subtitle}\usebeamercolor[fg]{subtitle}\insertsubtitle\par}%
      \fi%     
    \end{beamercolorbox}%
    \vskip1em\par
    \begin{beamercolorbox}[sep=8pt,center]{author}
      \usebeamerfont{author}\insertauthor
    \end{beamercolorbox}
    \vskip-1em\par % change here
    \begin{beamercolorbox}[sep=8pt,center]{institute}
      \usebeamerfont{institute}\insertinstitute
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{date}
      \usebeamerfont{date}\insertdate
    \end{beamercolorbox}\vskip0.5em
  \end{centering}
  \vfill
}
\makeatother

\begin{document}

\maketitle

\end{document}

enter image description here

Notice that now there's no need to use \title[TITLE]{TITLE\includegraphics{...}} but now you can simply use \title{TITLE} and \titlegraphic{\includegraphics[]{}}`. Of course, feel free to make the necessary adjutments according to your particular needs (yo can play with the lengths in the \vskip commands to adjust vertical spacing).

As requested in a comment, to have a colored box around only the subtitle, the necessary modifications are the following:

\documentclass{beamer}

\title{TITLE}
\titlegraphic{\includegraphics[height=4cm]{cat}}
\subtitle{\textbf{Subtitle}}
\author{Author}


\makeatletter
\setbeamertemplate{title page}
{
  \vbox{}
  \vfill
  \begin{centering}
    \begin{beamercolorbox}[sep=8pt,center]{title}
      \usebeamerfont{title}\inserttitle
    \end{beamercolorbox}
      {\usebeamercolor[fg]{titlegraphic}\inserttitlegraphic\par}
      \ifx\insertsubtitle\@empty%
      \else%
        \vskip0.25em%
      \setbeamercolor{title}{bg=orange,fg=white}
      \begin{beamercolorbox}[sep=8pt,center]{title}
        {\usebeamerfont{subtitle}\usebeamercolor[fg]{subtitle}\insertsubtitle\par}%
      \fi%     
    \end{beamercolorbox}%
    \vskip1em\par
    \begin{beamercolorbox}[sep=8pt,center]{author}
      \usebeamerfont{author}\insertauthor
    \end{beamercolorbox}
    \vskip-1em\par % change here
    \begin{beamercolorbox}[sep=8pt,center]{institute}
      \usebeamerfont{institute}\insertinstitute
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{date}
      \usebeamerfont{date}\insertdate
    \end{beamercolorbox}\vskip0.5em
  \end{centering}
  \vfill
}
\makeatother

\begin{document}

\maketitle

\end{document}

enter image description here

With a new request, here's the code to change at will the width of the box used for the subtitle; change the length used for \subtitwd (initially set to 4cm) according to your needs:

\documentclass{beamer}

\newlength\subtitwd
\setlength\subtitwd{4cm}% change the width here

\makeatletter
\setbeamertemplate{title page}
{
  \vbox{}
  \vfill
  \begin{centering}
    \begin{beamercolorbox}[sep=8pt,center]{title}
      \usebeamerfont{title}\inserttitle
    \end{beamercolorbox}
      {\usebeamercolor[fg]{titlegraphic}\inserttitlegraphic\par}
      \ifx\insertsubtitle\@empty%
      \else%
        \vskip0.25em%
      \setbeamercolor{title}{bg=orange,fg=white}
      \vbox{%
         \hfill\begin{beamercolorbox}[wd=\subtitwd,sep=8pt,center]{title}
            {\usebeamerfont{subtitle}\usebeamercolor[fg]{subtitle}\insertsubtitle\par}%
        \end{beamercolorbox}\hfill\null%
      }%
      \fi%     
    \vskip1em\par
    \begin{beamercolorbox}[sep=8pt,center]{author}
      \usebeamerfont{author}\insertauthor
    \end{beamercolorbox}
    \vskip-1em\par % change here
    \begin{beamercolorbox}[sep=8pt,center]{institute}
      \usebeamerfont{institute}\insertinstitute
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{date}
      \usebeamerfont{date}\insertdate
    \end{beamercolorbox}\vskip0.5em
  \end{centering}
  \vfill
}
\makeatother

\title{TITLE}
\titlegraphic{\includegraphics[height=4cm]{cat}}
\subtitle{\textbf{Subtitle}}
\author{Author}

\begin{document}

\maketitle

\end{document}

enter image description here

[Tex/LaTex] Generating a box inside algorithm in beamer

Here's one possibility, placing marks and then using the marks to draw the boxes and the arrow:

\documentclass{beamer}
\usepackage{algorithm,algpseudocode}
\usepackage{tikz}
\usetikzlibrary{arrows,calc,intersections}
\usepackage{xcolor}
\makeatletter

\newcommand\tikzmark[1]{%
  \tikz[overlay,remember picture,baseline] \coordinate (#1);}

\begin{document}

\begin{frame} 
\begin{algorithm}[H]
\begin{algorithmic}
\State\tikzmark{start1} $y \leftarrow 1$
% Start box 1
\If{$n < 0$}
\State $X \leftarrow 1 / x$
\State $N \leftarrow -n$
\Else
\State $X \leftarrow x$
\State $N \leftarrow n$
\EndIf\tikzmark{end1}
%End box 1
%Start box 2
\Statex\vskip-2.2ex
\tikzmark{start2}\While{$N \neq 0$}
\If{$N$ is even}
\State $X \leftarrow X \times X$
\State $N \leftarrow N / 2$
\Else[$N$ is odd]
\State $y \leftarrow y \times X$
\State $N \leftarrow N - 1$
\EndIf
\EndWhile\tikzmark{end2}
% End box 2
\end{algorithmic}
\end{algorithm}

\begin{tikzpicture}[remember picture,overlay]
\draw[orange] ( $ (start1) + (-2pt,-2pt) $ ) rectangle ( $ (end1) + (1.3,-2pt) $ );
\draw[orange] ( $ (start2) + (-2pt,-2pt) $ ) rectangle ( $ (end2) + (1.8,-2pt) $ );
\draw[orange,-latex] let \p1=(start1), \p2=(end1), \p3=(start2), \p4=(end2) 
  in ( $ (\x2,0.5*\y1+0.5*\y2) + (1.3,0) $ ) to[out=0,in=0] ( $ (\x4,0.5*\y3+0.5*\y4) + (1.8,0) $ );
\end{tikzpicture}
\end{frame}

\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Title in box in Beamer presentation

[Tex/LaTex] Generating a box inside algorithm in beamer

Related Question