[Woifi]

Ja, wahnsinn, es ist sogar möglich jpg-files einzubinden!

Include jpg
pdflatex can include .jpg (amont other formats). The manual also says that you can include .tiff files, but I never saw this running. However, here is how you include figure.pdf:

\usepackage{graphics}
...
\begin{figure}[t]
\includegraphics{figure}
\caption{MyFigure}
\end{figure}

And here is how you include otherfigure.jpg:

\usepackage{graphics}
...
\begin{figure}[t]
\includegraphics{otherfigure}
\caption{MyOtherFigure}
\end{figure}

You got it. The graphics package looks at the available files, and includes the one that fits best. So you don't need to specify the extension of the included graphics.

@Peter
Many Thanks!!!