\documentclass[10pt]{article} \usepackage{pgfplots} \usepgfplotslibrary{groupplots} \begin{document} \begin{tikzpicture}% %\begin{axis}[% \begin{groupplot}[% group style={group size=1 by 1},% ]% \nextgroupplot; \node[name=a] at (axis cs:0.1,-1) {N}; \addplot coordinates{(0,1) (1,2)}; \end{groupplot} %\end{axis} \draw (a) circle (5pt); \end{tikzpicture}% \end{document}