A simple Tree

A simple tree with a style for all nodes.

A tree is a very common type of hierarchical graph. Tree nodes have children. These are connected by edges and are usually displayed in rows when growing down or in columns when growing horizontally.

Full explanation in Chapter 9, Creating Graphics: Growing a tree

Tree

% A simple Tree
% Author: Stefan Kottwitz
% https://www.packtpub.com/hardware-and-creative/latex-cookbook
\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[sibling distance=10em,
  every node/.style = {shape=rectangle, rounded corners,
    draw, align=center,
    top color=white, bottom color=blue!20}]]
  \node {Formulas}
    child { node {single-line} }
    child { node {multi-line}
      child { node {aligned at}
        child { node {relation sign} }
        child { node {several places} }
        child { node {center} } }
      child { node {first left,\\centered,\\last right} } };
\end{tikzpicture}
\end{document}
Click to download: tree.textree.pdf
Open in Overleaf: tree.tex