Editing Template:Tree list/doc (section)

==Collapse==
To collapse a tree place {{tlx|Hidden begin}} before {{tlx|Tree list}} and enclose {{tlx|Tree list/end}} with  {{tlx|Hidden end}}. {{tlx|Hidden begin}} default to just a show link on the right, but it takes a number of parameters see the template's documentation. In this case:
 |border=1px  #aaa solid — a solid border around the tree
 |title=Demonstration tree — a suitable name for the tree
 |ta1=center – center the title= name 

<syntaxhighlight lang="wikitext">
{{hidden begin|border=1px  #aaa solid|title=Demonstration tree|ta1=center}}
{{Tree list}}
* A first level branch
** {{Tree list/branching}}
*** A third level branch
*** Another third level branch
*** The final third level branch
** A second level branch
** {{Tree list/branching}}                 <!--- This branch ends the second level --->
*** A third level branch
*** The final third level branch
{{Tree list/end}}
{{Hidden end}}
</syntaxhighlight>

{{hidden begin|border=1px  #aaa solid|ta1=center||title=Demonstration tree}}
{{Tree list}}
* A first level branch
** {{Tree list/branching}}
*** A third level branch
*** Another third level branch
*** The final third level branch
** A second level branch
** {{Tree list/branching}}                 <!--- This branch ends the second level --->
*** A third level branch
*** The final third level branch
{{Tree list/end}}
{{Hidden end}}

If the parameter <code>|expanded=on</code> is added to {{tlx|hidden begin}} then the box will be drawn expanded rather than the default, which is to collapse the tree.