Specify the number of levels to display by default below the current node in a hierarchy on the Hierarchy tab of the Taxonomy module.
Description
In the Taxonomy module, only one level below the current node is displayed by default on the Hierarchy tab (the current node is highlighted in blue):
To expand the full tree below the current node may require hundreds or even thousands of queries for a broad tree (especially if the current node is of high rank). If the user wants to see the full tree below the current node, they can click the Expand 
button to the right of the Hierarchy list.
It is possible to set the default number of child levels to display below the current node using the ShowTreeChildren Registry entry. In this example, the ShowTreeChildren Registry entry is set to four, and up to four levels will display by default:
Usage
| Key | User | Group | Group |
|---|---|---|---|
| Key 1 | User
|
Group
|
Group
|
| Key 2 | user | group | Default
|
| Key 3 | Table
|
Table
|
Table
|
| Key 4 | etaxonomy
|
||
| Key 5 | ShowTreeChildren
|
||
| Value | levels | ||
In pipe-delimited format:
User
|
user | Table
|
etaxonomy
|
ShowTreeChildren
|
levels |
Group
|
group | Table
|
etaxonomy
|
ShowTreeChildren
|
levels |
Group
|
Default
|
Table
|
etaxonomy
|
ShowTreeChildren
|
levels |
where:
|
levels |
is the number of levels to display below the current node. |
Example
This entry specifies that by default up to four levels in the hierarchy will display below the current node on the Hierarchy tab of the Taxonomy module:
| Key | Setting |
|---|---|
| Key 1 | Group
|
| Key 2 | Default
|
| Key 3 | Table
|
| Key 4 | etaxonomy
|
| Key 5 | ShowTreeChildren
|
| Value | 4
|