Template:Category tree both/doc

This navigation template displays two showable lists: subcategories at the left and parent categories at the right.

Usage

 * namespace = category
 * placement = lower, just above categories
 * usage-notes = This template takes one unnamed optional parameter (1). By default parameter 1 is " ", which expands to the current page.

Syntax
 * - basic form, uses the name of the category page it is placed on
 * - uses  as the category page name


 * Parameter 1 = optional (default is name of the category page it is placed on), name of root category for both trees. By default the name of the category page it is placed on is used. For example  will make the browser render the template as two boxes, the left side showing subcategories of Astronomy, the right showing parents of Astronomy.