Wikipedia:Tip of the day/March 1

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How to plant a CategoryTree!

The CategoryTree is a MediaWiki extension that provides a dynamic view: you can change how much you see of a category's structure as a tree. You can use it to show a category and its subcategories by putting the category name between category tree tags like this:

<categorytree> pigs </categorytree>

The result is a category tree like the one shown to the right. Click on the triangles to expand and collapse the tree.