Simplify the following text for a Grade 9 native English-speaking person.
Original: In addition to the output message , the template categorizes pages to Documentation subpages and defaults the sort key to the page name without namespace ( ie , `` Foo '' on `` Template : Foo '' , so it would be sorted in categories under ` F ' ) .
Simplified: It defaults the sort key to the page name without namespace ( ie , `` Foo '' on `` Template : Foo '' , so it would be sorted in categories under ` F ' ) .