Template:DISPLAYTITLE/doc

Examples
Notice the use of the ":" instead of "|".

Introduction
The title of a page name can always be copied and pasted to affect links, inclusions, and categories. DISPLAYTITLE enforces this, so you will find that only changes that will convert to canonical form will actually change the displayed title. It is possible to preview the changed title while on the edit page. One illegal change, such as the capitalization of pagename letter after the first letter will invalidate any and all the other allowed changes.

The title of a named page is the fullpagename, denoted "namespace:pagename". The namespace of an article is nameless, so it does not display, and the fullpagename is pagename.

It is important to note the warning sign at the top of this page preferring that the template form of DISPLAYTITLE, not be used, but that rather the magic variable form of  be used directly as documented next. The template would simply call the magic word DISPLAYTITLE anyway, so using template DISPLAYTITLE creates an (acceptable but) unnecessary step in page processing.

Magic variables use ":", and templates use "|" to indicate the page name to process here. Use the magic variable. If "|" is used instead of ":", it places the page in Category:Pages which use a template in place of a magic word, which may cause distractions.

Description
The title (the fullpagename) is changed using   anywhere in the wikitext. As usual in markup, multiple spaces are made singular. The allowed visual changes are simply: These possibilities exist because of the definition of a page name, which allows for the canonicalization of any title by copying and pasting the title into links, inclusions, and category names.
 * lower-case the initial letter of the pagename
 * change the case of any letter of the namespace
 * add an initial colon to the title (the fullpagename)
 * change any space to an underscore "_" character or any underscore character to a space
 * add any number or mixture of spaces and underscores
 * around the separator character ":" (between the namespace and pagename), or
 * between words in the pagename
 * before or after the title (where spaces alone are ignored)
 * add bold or italic character formatting to any letters in the fullpagename

If there is more than one instance of DISPLAYTITLE in the wikitext, the last one overrides the previous ones. This means that if the DISPLAYTITLE automatically generated by something like some bookbox template needs to be overridden, then an explicit DISPLAYTITLE must be placed after that template to make your version display. If all efforts to change the title (with canonicalization compliance) fail, try looking at the bottom of the page for some stray magic variable DISPLAYTITLE.

Instructions
Template DISPLAYTITLE has the same instructions as magic variable DISPLAYTITLE. Please use ":" instead of "|".

Because more than one instance of DISPLAYTITLE can surreptitiously occur, only the last instance is enacted. DISPLAYTITLE is guaranteed to work when placed after any other templates such as the info box templates.
 * 1) Type  ". (See the examples above.)
 * 2) Preview the page and check the results.