Help:System messages

System Messages 

Systems Messages provide a means for customising the look and feel of a wiki. Because their impact is system wide only admins and above normally have access to them. Others may look, but they may not edit.

Appearance

 * Monobook.css - The global stylesheet for your wiki.
 * Monobook.js  - ?
 * Tagline      - Just below the main heading of each page, there is a tagline just under the line. This controls the text of that tagline.

File Management
1movedto2 1movedto2_redir

These relate to the renaming of files, which is done by moving a file from one name to another.

Labels

 * aboutsite - Default value="About ". This is the link that is found at the bottom of every page that leads to the page describing what the wiki is about.
 * Activeusers - Default value="Active User List". This is the link from Special Pages to the list of users who have edited the wiki.
 * bold_tip - Default value="Bold Text". This controls a tool tip in the Editing Screen.
 * Contribslink - Default value="Contribs". Controls one of the labels used in the Recent Changes report.


 * Contribsub - Default value="For $1". This label used by the User Contributions report.
 * History - Default value="Page history". In the Recent Changes report, each page listed has an option labeled Page history. This is where the label is controlled.
 * Hr tip - Default value="Horizontal line (use sparingly)". This controls a tool tip in the Editing Screen.
 * Toc - Default value="Contents". Shows up anytime a table of contents is automatically generated as part of an article.

Navigation

 * aboutpage - default value="   :About". This provides the name of the file to be linked to, that describes what the wiki is about.
 * sidebar - This controls the navigation box on the left hand side of the screen.
 * Mainpage - Set the official Main Page for the Wiki.

Message Texts
Why would you want to muck with these messages? Probably you wouldn't. Exceptions would be to improved readability from the standpoint of your target audience. Particularly if you expect them to be accustomed to a language different from the defaults.
 * activeusersintro - Text to be displayed at the top of the Active Users page.
 * activeusersline - This controls the line for each active user in the Active Users List Page.
 * addedwatchtext - Text to be displayed when a user has chosen to watch a new page.
 * anontalkpagetext - Default auto text for when the talk page of an anonymous IP is written to.
 * bold_sample - Default auto text if the Bold button in the editor is used without highlighting anything.
 * newarticletext - This is the message that you get when you follow a link to a page that doesn't exist yet.
 * Sitenotice - This has a special purpose. It is usually used for making announcements. Whatever is placed in it will go above the page title.

Page Headings
These only affect the page headings of certain messages that are displayed to users when they have done something.


 * activeuserstitle - Default heading for this page is "Active Users"
 * addedwatch - This shows up anytime a logged in user adds a page to their watch list.
 * allmessages - Default heading for this page is "System messages"
 * ancientpages - Default heading for this page is "Oldest pages". One of the reports available from Special Pages
 * Contributions - Heading for the page that lists all edits made by a given user. The change will also show up in the Toolbox when relevant.

From Wikia, a Wikia wiki.