我无法让一forest棵树适合整个页面。我想知道有什么技巧可以挤压下面的树，这样它就不会占用太多的水平空间。我的想法（但无法执行）是：
1）强制节点具有最大宽度（因此文本流动到多行）
2）允许树中同一级别的节点在页面上具有不同的垂直位置（以便它们可以重叠）。
任何建议都将不胜感激！如果我在这种情况下使用了完全错误的包，请告诉我。
\documentclass[a4paper,12pt]{article}
\usepackage{forest}
\begin{document}
\begin{forest}
[What could prevent a transaction?
[Customer can't top up
[Customer has insufficient funds
[Seasonal/short term issue]
[Poor customer selection]
[Change in circumstances]
]
[Can't execute top up
[Customer doesn't know where to go]
[Top up process unclear to customer]
[Top up merchant does not know the process]
[Merchant fraud]
[Agent fraud]
]
]
[Customer doesn't want to top up
[Dissatisfied with unit
[Performance below expectations
[Unit degradation]
[Poor installation]
]
[Unresolved maintenance issue]
[Unit stolen or vandalised]
]
]
]
\end{forest}
\end{document}
编辑： 对于将来遇到此问题的人，以下是我认为最有用的答案。对于经验丰富的森林使用者来说，这些答案可能很明显，抱歉...
1）水平而不是垂直地生长一棵树，在之后使用此代码\begin{forest}：
for tree={
child anchor=west,
parent anchor=east,
grow'=east}
2）控制文本宽度，只需在上面提到的text width=内容中添加即可for tree={}。
3）为节点创建单独的样式：（name/.style={}参见cfr的答案）
4) 改变单个节点的对齐方式，使得它相当于树中的不同级别：放入空白行（即嵌套在内[ ]）。
非常感谢您提供的非常有帮助的回复。
答案1
换行没问题，但说实话，如果在同一层级上有这么多水平信息，垂直换行会很困难。我建议水平布局，而且你还得选择较小的字体或稍微缩放一下。也许像下面这样：
\documentclass[a4paper,12pt]{article}
\usepackage{forest}
\begin{document}
\resizebox{\textwidth}{!}{%
\begin{forest}
for tree={
child anchor=west,
parent anchor=east,
grow'=east,
%minimum size=1cm,%new possibility
text width=4cm,%
draw,
anchor=west,
edge path={
\noexpand\path[\forestoption{edge}]
(.child anchor) -| +(-5pt,0) -- +(-5pt,0) |-
(!u.parent anchor)\forestoption{edge label};
},
}
[What could prevent a transaction?
[Customer can't top up
[Customer has insufficient funds
[Seasonal/short term issue]
[Poor customer selection]
[Change in circumstances]
]
[Can't execute top up
[Customer doesn't know where to go]
[Top up process unclear to customer]
[Top up merchant does not know the process]
[Merchant fraud]
[Agent fraud]
]
]
[Customer doesn't want to top up
[Dissatisfied with unit
[Performance below expectations
[Unit degradation]
[Poor installation]
]
[Unresolved maintenance issue]
[Unit stolen or vandalised]
]
]
]
\end{forest}
}%
\end{document}
答案2
我并不是说这样做很明智，但是如果您使用风景并稍微重新考虑一下，您就可以垂直呈现这棵树。
例如：
\documentclass[a4paper,12pt]{article}
\usepackage{forest,pdflscape}
\pagestyle{empty}
\begin{document}
\forestset{
skip one/.style={
replace by={
[,
shape=coordinate,
l*=.25,
append
]
},
},
customer/.style={
content={Customer},
draw=red,
inner color=red!10,
outer color=red!20,
for descendants={
draw=red,
inner color=red!10,
outer color=red!20,
},
before drawing tree={
for descendants={
edge={draw=red}
},
}
},
merchant/.style={
content={Merchant},
draw=blue,
inner color=blue!10,
outer color=blue!20,
for descendants={
draw=blue,
inner color=blue!10,
outer color=blue!20,
},
before drawing tree={
for descendants={
edge={draw=blue}
}
},
},
agent/.style={
content={Agent},
draw=green!50!black,
inner color=green!50!black!10,
outer color=green!50!black!20,
for descendants={
draw=green!50!black,
inner color=green!50!black!10,
outer color=green!50!black!20,
},
before drawing tree={
for descendants={
edge={draw=green!50!black}
},
}
},
nobody/.style={
for descendants={
draw=black,
inner color=gray!10,
outer color=gray!20,
},
before drawing tree={
for descendants={
edge={draw=black}
},
}
},
}
\begin{landscape}
\noindent
\begin{forest}
for tree={
parent anchor=south,
child anchor=north,
draw,
thick,
font=\small\sffamily,
align=center,
delay={
where content={}{
shape=coordinate,
}{},
},
},
before packing={
for tree={
if={isodd(n_children())}{
for children={
if={equal(n,int((1+n_children("!u"))/2))}{
calign with current,
}{},
},
}{},
edge path={
\noexpand\path [draw, thick, \forestoption{edge}] (!u.parent anchor) -- ++(0,-5pt) |- ($(.child anchor) + (0,5pt)$) -- (.child anchor)\forestoption{edge label};
},
},
},
[What could prevent a transaction?, inner color=gray!10, outer color=gray!20,
[, customer
[Can't top up
[Insufficient funds
[Seasonal/short term issue, skip one, l*=2]
[Poor selection, skip one]
[Changed circumstances, skip one, l*=4]
]
[Unable to top up
[, customer
[Process unclear, skip one]
[Unsure where to go, skip one, l*=2]
]
[, merchant
[Process unfamiliar
]
[Fraud
]
]
[, agent
[Fraud]
]
]
]
[Doesn't want to top up
[Dissatisfied with unit, nobody
[, l*=2.5
[Performance below expectations, skip one, l*=2
[Unit degradation]
[Poor installation]
]
[Unresolved maintenance issue, skip one]
[Unit stolen or vandalised, skip one, l*=2]
]
]
]
]
]
\end{forest}
\end{landscape}
\end{document}
