Q:

TikZ customize default

I would like to customize the default settings of tikzpicture.
Usually I use:
\begin{tikzpicture}[overlay, remember picture, shift={(current page.center)}]
....
\end{tikzpicture}

I would like to set the options [overlay, remember picture, shift={(current page.center)}] at the beginning of the document or better in the my theme's configurations file once and just use:
\begin{tikzpicture}
....
\end{tikzpicture}

Thanks

A:

A bit of a strange thing to do, but:
\documentclass[a4paper]{article}
\usepackage{tikz}
\tikzset{every picture/.append style={overlay,remember picture,shift={(current page.center)}}}
\begin{document}
\begin{tikzpicture}
\node{Foo};
\end{tikzpicture}
\newpage
\begin{tikzpicture}
\node{Bar};
\end{tikzpicture}

\end{document}

