LaTeX: TikZ playground.

gistfile1.tex

\documentclass{article}

\usepackage{tikz}
\usepackage{pgfplots}
\usepackage[scaled]{helvet}
\usepackage[T1]{fontenc}
\usepackage{verbatim}

\renewcommand*\familydefault{\sfdefault} %% Only if the base font of the document is to be sans serif

\usetikzlibrary{plotmarks}

%%%<
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\setlength\PreviewBorder{5pt}
%%%>

\begin{document}
\begin{tikzpicture}

  \node at (0,0) {Hello World!};
	
\end{tikzpicture}
\end{document}