[Tex/LaTex] Place image on a new page without top margin

articlemargins

I have an article:

\documentclass[a4paper,12pt,oneside]{article}

Now in a section I have a figure:

\begin{figure}
\centering
\includegraphics[scale=0.65]{images/rlexample.png}
\caption{---}
\label{rlexample}
\end{figure}

This figure is pretty big, so I would like to show them in a single page without the classic top margin. Is there anyway to specify a negative top margin just for showing this figure?

Solution

Thanks to Prof. @egreg the solution is (with pagenumber hiding)

\begin{figure}
\centering
\vspace*{-3cm}
\includegraphics[scale=0.6]{images/rlexample.png}
\caption{---}
\label{rlexample}
\end{figure}

\thispagestyle{empty}

Best Answer

You just need to make LaTeX think that the image takes less vertical space:

\begin{figure}
\centering
\vspace*{-3cm}
\includegraphics[scale=0.6]{images/rlexample.png}
\caption{---}
\label{rlexample}
\end{figure}

In order to safely remove the header and footer, you need to use fancyhdr and its \iffloatpage macro.

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