% A simple Tree
% Author: Stefan Kottwitz
% https://www.packtpub.com/hardware-and-creative/latex-cookbook
\documentclass[border=10pt]{standalone} 
%%%<
\usepackage{verbatim}
%%%>
\begin{comment}
:Title: A simple Tree
:Tags: Trees;Graphics;TikZ
:Author: Stefan Kottwitz
:Slug: 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](https://latex-cookbook.net/tree/)
\end{comment}
\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}

