A demonstration of the qtree package, by way of its documentation.
Source and further information is available on CTAN.
This example was originally published on ShareLaTeX and subsequently moved to Overleaf in November 2019.
\begin
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% You need the tree-dvips package to process this file.
% Alexis Dimitriadis (alexis@ling.upenn.edu) 10/10/99
\documentclass{article}
\advance\textheight by 1in
\advance\textwidth by 0.5in
\topmargin=-0.3in
\usepackage{tree-dvips}
\usepackage{qtree}
% PostScript to PDF conversion using ghostscript (alias ps2pdf)
% looks better on-screen if one of the built-in PDF fonts is used:
\usepackage{times}
\begin{document}
\centerline{\large\bf Examples: Drawing arrows on \emph{qtree} trees}
\medskip
The arrow-drawing capabilities of the package \emph{tree-dvips} (written by
Emma Pease) can be used with trees drawn with \emph{qtree}. The two packages
are fully compatible.
Note, however, that tree-dvips relies on PostScript specials, and thus does not work with pdf\LaTeX. This file was generated as DVI and then converted to pdf.
\emph{Tree-dvips} is not included in the distribution of \emph{qtree;} it is
available on CTAN.
Thanks to Seth Kulick for telling me about the combination, and to Amanda
Seidl for contributing the verb-movement example.
\bigskip
\hskip 1.5cm\Tree [ [ \node{subj1}subj_i ].NP [ [
T+v_n+\node{V}V_j+Apl_k
].T [ \node{io}{ }IO_l
[ \node{subj2}t_i [ \node{v1}t_n [ \node{do}DO_m [ \node{io1}t_l
[ \node{apl1}t_k [ [ \node{V1}t_j ].V
\node{do1}t_m ].VP ].Apl\1
].Apl\1 ].AplP ].{\it v}\1 ].{\it v}\1 ].{\it v}P ].T\1 ].TP
\anodecurve[bl]{subj2}[bl]{subj1}{0.4in}%
\anodecurve[bl]{do1}[bl]{do}{0.4in}%
{\makedash{4pt}\anodecurve[t]{io1}[r]{io}{.5in}}%
\anodecurve[bl]{V1}[bl]{apl1}{0.6in}%
\anodecurve[bl]{apl1}[bl]{v1}{1in}%
\anodecurve[bl]{v1}[bl]{V}{0.9in}%
% These would give square movement arrows instead:
%
% \abarnodeconnect[-6pt]{subj2}{subj1}{0.4in}
% \abarnodeconnect[-6pt]{do1}{do}{0.4in}
% {\makedash{4pt}{\anodecurve[t]{io1}[r]{io}{.5in}}}
% \abarnodeconnect[-6pt]{V1}{apl1}{0.6in}
% \abarnodeconnect[-6pt]{apl1}{v1}{1in}
% \abarnodeconnect[-6pt]{v1}{V}{0.9in}
\vspace*{-0.95in}
\noindent
{\small\begin{verbatim}
\Tree
[ [ \node{subj1}subj_i ].NP
[ [ T+v_n+\node{V}V_j+Apl_k ].T
[ \node{io}{ }IO_l
[ \node{subj2}t_i [ \node{v1}t_n
[ \node{do}DO_m [ \node{io1}t_l
[ \node{apl1}t_k [ [ \node{V1}t_j ].V
\node{do1}t_m ].VP ].Apl\1
].Apl\1 ].AplP ].{\it v}\1 ].{\it v}\1
].{\it v}P ].T\1 ].TP
\anodecurve[bl]{subj2}[bl]{subj1}{0.4in}
\anodecurve[bl]{do1}[bl]{do}{0.4in}
{\makedash{4pt}\anodecurve[t]{io1}[r]{io}{.5in}}
\anodecurve[bl]{V1}[bl]{apl1}{0.6in}
\anodecurve[bl]{apl1}[bl]{v1}{1in}
\anodecurve[bl]{v1}[bl]{V}{0.9in}
\end{verbatim}}
% A little bug: Because of how TeX assigns type categories to its input, the
% automatic math-mode switching of label subscripts does not work inside
% footnotes or boxes. To work around this, invoke \verb|\automath|
% \emph{before} entering in the box or footnote. (This will enable
% auto-switching to math mode anywhere in the text).
\automath
\noindent\hskip-0.3cm
\parbox{1.2in}{%
\Tree [.S [.NP \node{subj}{subj_i} ]
[.VP [.V verb ] [.NP \node{t}{t_i} ]]] \bigskip}
\abarnodeconnect[-6pt]{t}{subj}
% Another problem: \verbatim cannot be used inside anything boxes or
% footnotes (for the same reason). Use this substitute.
{\obeyspaces\obeylines%
\parbox{3.9in}{\tt\chardef\\=`\\% % Let \\ be \backslash
\\Tree [.S [.NP \\node\{subj\}\{subj\_i\} ]
\ [.VP [.V verb ] [.NP \\node\{t\}\{t\_i\} ]]]
~
\\abarnodeconnect[-6pt]\{t\}\{subj\}}}
\end{document}