Fullpage picture in two column layout

I'd like to insert a picture (figure) into a document which is using a two-column layout. However, I want i开发者_如何学运维t to take one whole page and not be centered on one of the columns. Currently if I add a [p] modifier to the figure, the whole image lands on the last page, instead in the middle of the document.

How can I force one page to switch back to a single-column layout and insert a single big picture there?

---

Use the figure* environment. So instead of

\begin{figure}[ht] % I typically use ht
\centering
...
\end{figure}

you should use

\begin{figure*}[ht]
\centering
...
\end{figure*}

This also works for tables (i.e. table*). Hope this helps! Consider this link for more information

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It is not elegant, but with float package loaded you can use:

\begin{figure}[H]
\onecolumn\includegraphics{arc}
\end{figure}
\twocolumn

But you have to place this piece of code to exact locetion in source code. Otherwise you'll get pagebreak anywhere in twocolumned page, then page with image image.

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To supplement @Crowley's answer, to avoid pagebreak after implementation. Instead of using \twocolumn, use this package instead \usepackage{multicol}. Then,

  \begin{multicols}{2}
   \section Write or place anything you want
    \end{multicols}

This works for me!

---

\usepackage{multicol} in your preamble.

Then

\begin{document}
\begin{multicols}{2}

blah blah blah text

\end{multicols}

\begin{figure}[H]
\includegraphics[width=1\textwidth]{arc}
\end{figure}

\begin{multicols}{2}

blah blah blah text

\end{multicols}
\end{document}

This is ugly, and dirty. and you will need to fiddle with where you figure is in order to get the text balanced, but it is exactly what you asked for.