Centre of a tikz node

Question

The following code due to @domenico-camasta

\documentclass{article}
\usepackage{graphicx}
\usepackage{tikz}

\begin{document}

\begin{figure}
    \begin{tikzpicture}
    \node(a){\includegraphics[width=0.8\textwidth]{example-image-a}};
    \node at (a.north east)
    [
    anchor=center,
    xshift=0mm,
    yshift=0mm
    ]
    {
        \includegraphics[width=0.3\textwidth]{example-image-b}
    };
    \end{tikzpicture}
\end{figure}

\end{document}

produces the following result

See also Superimpose two images in an article

How do I need to rewrite

a.north east

in the example above if I would like image B to be placed:

1) in the centre of image A

2) in the centre east of image A?

not north east but center east – Viesturs Jun 30 '17 at 18:52 — Viesturs, Jun 30 '17 at 18:52

score 8 · Accepted Answer · edited Jul 01 '20 at 10:03

Look in chapter 72 of the tikz and pgf manual about the shape library. There you'll find a list of node shapes and for each of them a diagram with the predefined anchors is shown, similar to this for the default rectangle shape:

(Note that the 10 and 130 anchors are just examples, you can use any degree between 0 and 360.)

Hence, you're after the center and east anchors, as in the code below.

Note also that you probably want to set inner sep=0 for the a node, to remove the "padding" between the node content and the border.

\documentclass{article}
\usepackage{graphicx}
\usepackage{tikz}
\begin{document}
\begin{figure}
    \begin{tikzpicture}
    \node [inner sep=0] (a){\includegraphics[width=0.8\textwidth]{example-image}};
    \node at (a.north east)
    [
    anchor=center,
    xshift=0mm,
    yshift=0mm
    ]
    {
        \includegraphics[width=0.3\textwidth]{example-image-a}
    };
    \node at (a.center) {\includegraphics[width=0.3\textwidth]{example-image-b}};
    \node at (a.east) {\includegraphics[width=0.3\textwidth]{example-image-c}};
    \end{tikzpicture}
\end{figure}
\end{document}

Nice. That picture from page 67 should be compulsory reading! — PatrickT, Dec 01 '18 at 18:18

AboAmmar · Answer 2 · 2017-06-30T19:04:57.997

The default positioning is using center and the default anchor is center, so just node at (a) will put the node at a.center. The center east position is just east, accordingly.

\documentclass{article}
\usepackage{graphicx}
\usepackage{tikz}

\begin{document}

\begin{figure}
    \begin{tikzpicture}
    \node(a)[inner sep=0pt]{\includegraphics[width=0.8\textwidth]{example-image-a}};
    \node at (a)
    {
        \includegraphics[width=0.3\textwidth]{example-image-b}
    }
    node at (a.east)
    {
        \includegraphics[width=0.3\textwidth]{example-image-b}
    };
    \end{tikzpicture}
\end{figure}

\end{document}

Centre of a tikz node

2 Answers2