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I am including syntactic trees in my dissertation. Below each tree there is a tremendous amount of white space, which will cause the university's editorial office to scream and howl and moan, then ultimately to reject my dissertation until I fix it. How do I remove the superfluous white space below the tree?

MWE:

\documentclass{article}
\usepackage{tikz-qtree,tikz-qtree-compat}
\usepackage{gb4e}
\tikzset{every tree node/.style={align=center, anchor=north}}
\begin{document}
The relevant structure in \ref{tree:opt-marker-verb-move} shows the necessary movement for the verb to precede the suffix. XP refers to some unknown structure to which the verb is drawn.

\begin{exe}
\ex
\leavevmode\vadjust{\vspace{-\baselineskip}}\newline %this command makes the example number line up with the top of the tree, rather than the bottom
\begin{tikzpicture}
\tikzset{every tree node/.style={align=center,anchor=north}}
\Tree [.XP \node(XP){}; 
[.\textsc{FocusP} =em 
[.TP
[.vP {} 
[.VP {} 
[.V \node(VERB){puv}; ] 
] ] ] ] ]
\draw[->] (VERB) [in=-90,out=-90,looseness=1.5] to (XP);
\end{tikzpicture}\label{tree:opt-marker-verb-move}
\end{exe}

It is difficult to justify this verbal movement. First, we would have to identify a higher structure in a suitable relationship with the verb to motivate verbal movement. Then we would have to identify features to check that exist on both the new structure and the verb.
\end{document}
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3 Answers 3

One option is to use pgfinterruptboundingbox to interrupt the bounding box for the curved path; some manual spacing then will have to be added (or, see below for avoiding manual intervention):

\documentclass{article}
\usepackage{tikz-qtree,tikz-qtree-compat}
\usepackage{gb4e}
\tikzset{every tree node/.style={align=center, anchor=north}}
\begin{document}
The relevant structure in \ref{tree:opt-marker-verb-move} shows the necessary movement for the verb to precede the suffix. XP refers to some unknown structure to which the verb is drawn.


\begin{exe}
\ex
\leavevmode\vadjust{\vspace{-\baselineskip}}\newline %this command makes the example number line up with the top of the tree, rather than the bottom
\begin{tikzpicture}
\tikzset{every tree node/.style={align=center,anchor=north}}
\Tree [.XP \node(XP){}; 
[.\textsc{FocusP} =em 
[.TP
[.vP {} 
[.VP {} 
[.V \node(VERB){puv}; ] 
] ] ] ] ]
\begin{pgfinterruptboundingbox}
\draw[->] (VERB) [in=-90,out=-90,looseness=1.5] to (XP);
\end{pgfinterruptboundingbox}
\end{tikzpicture}\vspace{30pt}
\label{tree:opt-marker-verb-move}
\end{exe}

It is difficult to justify this verbal movement. First, we would have to identify a higher structure in a suitable relationship with the verb to motivate verbal movement. Then we would have to identify features to check that exist on both the new structure and the verb.

\end{document}

enter image description here

To avoid having to add spacing by hand, simply place anything sensible (an empty node, for example) below the lowest one after the bounding box has been interrupted:

\documentclass{article}
\usepackage{tikz-qtree,tikz-qtree-compat}
\usetikzlibrary{positioning}
\usepackage{gb4e}
\tikzset{every tree node/.style={align=center, anchor=north}}
\begin{document}
The relevant structure in \ref{tree:opt-marker-verb-move} shows the necessary movement for the verb to precede the suffix. XP refers to some unknown structure to which the verb is drawn.


\begin{exe}
\ex
\leavevmode\vadjust{\vspace{-\baselineskip}}\newline %this command makes the example number line up with the top of the tree, rather than the bottom
\begin{tikzpicture}
\tikzset{every tree node/.style={align=center,anchor=north}}
\Tree [.XP \node(XP){}; 
[.\textsc{FocusP} =em 
[.TP
[.vP {} 
[.VP {} 
[.V \node(VERB){puv}; ] 
] ] ] ] ]
\begin{pgfinterruptboundingbox}
\draw[->] (VERB) [in=-90,out=-90,looseness=1.5] to (XP);
\end{pgfinterruptboundingbox}
\node[below=of VERB] {};
\end{tikzpicture}
\label{tree:opt-marker-verb-move}
\end{exe}

It is difficult to justify this verbal movement. First, we would have to identify a higher structure in a suitable relationship with the verb to motivate verbal movement. Then we would have to identify features to check that exist on both the new structure and the verb.

\end{document}
share|improve this answer

You could use \useasboundingbox before the \draw command, to avoid it influencing the bounding box. Some extra space below must be added for the arrow, hence the [yshift=-1.2cm] (found by trial and error).

\documentclass{article}
\usepackage{tikz-qtree,tikz-qtree-compat}
\usepackage{gb4e}
\tikzset{every tree node/.style={align=center, anchor=north}}
\begin{document}
The relevant structure in \ref{tree:opt-marker-verb-move} shows the necessary movement for the verb to precede the suffix. XP refers to some unknown structure to which the verb is drawn.

\begin{exe}
\ex
\leavevmode\vadjust{\vspace{-\baselineskip}}\newline %this command makes the example number line up with the top of the tree, rather than the bottom
\begin{tikzpicture}
\tikzset{every tree node/.style={align=center,anchor=north}}
\Tree [.XP \node(XP){}; 
[.\textsc{FocusP} =em 
[.TP
[.vP {} 
[.VP {} 
[.V \node(VERB){puv}; ] 
] ] ] ] ]
\useasboundingbox (current bounding box.north west) rectangle ([yshift=-1.2cm]current bounding box.south east);

\draw[->] (VERB) [in=-90,out=-90,looseness=1.5] to (XP);
\end{tikzpicture}\label{tree:opt-marker-verb-move}
\end{exe}

It is difficult to justify this verbal movement. First, we would have to identify a higher structure in a suitable relationship with the verb to motivate verbal movement. Then we would have to identify features to check that exist on both the new structure and the verb.
\end{document}

enter image description here

share|improve this answer
up vote 0 down vote accepted

I was able to eliminate most of the white space by fiddling with the out value in the draw command. I changed it from -90 to -180, and achieved the desired spacing.

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