Warning, /graphics/tikzkit/texamples/rotateTikzPicture.tex is written in an unsupported language. File is not indexed.

 \documentclass[a4paper,10pt]{article}
 \usepackage[utf8]{inputenc}
 \usepackage[pdftex,active,tightpage]{preview}
 \usepackage{tikz}
 \PreviewEnvironment{tikzpicture}
 
 \begin{document}
 \thispagestyle{empty}
 \begin{tikzpicture}[rotate=45]
   \node[rotate=20] (a) at (0, 0) {a};
   \node[fill=red!100!green!50!blue!0!white] (b) at (2, 0) {b};
   \draw (a) -- (b);
 \end{tikzpicture}
 \end{document}