Beamer - Wide Example Box

Question

I am using this code to get an untitled example block.

\begin{exampleblock}{}
\end{exampleblock}

As we know, this box has a width equal to the text width. How can I modify the code to get a box that spans over the entire page as shown below ?

Any suggestion on this would be really helpful to me...

Thanks in advance.

Answer 1

You can use the tcolorbox package to easily create your box (you can use the beamer skin). Setting the desired width for the box (and the text width inside the box) is just a matter of setting the appropriate keys. A little example; since the original beamer theme used was not specified in the question, I defined my own colors to emulate the original ones; adjust the settings according to your needs:

\documentclass{beamer}
\usepackage[many]{tcolorbox}

\definecolor{myblue}{RGB}{0,112,214}
\makeatletter
\newtcolorbox{tcbexample}[1][]{
  skin=beamer,
  enhanced,
  title=#1,
  width=\paperwidth,
  left=\Gm@lmargin,
  right=\Gm@rmargin,
  enlarge left by=-\Gm@lmargin,
  enlarge right by=-\Gm@rmargin,
  arc=0pt,
  outer arc=0pt,
  colback=myblue,
  boxrule=0pt,
  colupper=white,
  colbacktitle=myblue!40!black
}
\makeatother

\begin{document}

\begin{frame}
\begin{tcbexample}
Some test text.
\end{tcbexample}
\begin{tcbexample}[A box with title]
Some longer test text that will span more than a line to illustrate text wrapping.
\end{tcbexample}
\end{frame}

\end{document}

The result: