Scalefnt and tkz

Question

I am trying to scale the font in a tikz picture using the scalefnt (compare this question) package. However for tkz obejects it doesn't work, for example:

\documentclass{minimal}
\usepackage{scalefnt}
\usepackage{tkz-euclide}

\begin{document}

{\scalefont{2}
\begin{tikzpicture}
   \path (2,0)  node{works};
   \tkzDefPoint(0,0){A}
   \tkzDrawPoint(A)
   \tkzLabelPoint(A){test}
\end{tikzpicture}
}
\end{document}

Any ideas how to fix this?

Answer 1

Looking at the file tkz-obj-points.tex you find that the style for the label of points is set using

\tikzset{label style/.style=\tkz@euc@pointpos,\tkz@euc@labelcolor,font=\normalsize}}

so you can change the font= key from \normalsize to the desired font:

\documentclass{article}
\usepackage{scalefnt}
\usepackage{tkz-euclide}

\makeatletter
\tikzset{label style/.style={\tkz@euc@pointpos,\tkz@euc@labelcolor,font=\scalefont{2}}}
\makeatother

\begin{document}

\begin{tikzpicture}[every node/.style={font=\scalefont{2}}]
   \path (2,0)  node{ works};
   \tkzDefPoint(0,0){A}
   \tkzDrawPoint(A)
   \tkzLabelPoint(A){test}
\end{tikzpicture}

\end{document}

I would suggest to make the change in the font size using every node/.style, as I did in my example code.