The page layout consists of tabs along the top of the window. These are:

Article. Shows the main Wikipedia article. Discussion. Shows a user discussion about the article's topic and possible revisions, controversies, etc. Edit this page. This tab allows users to edit the article. Depending on the controversy surrounding the topic, this tab may not be shown for all users. (For example, any user who is not an administrator will not be able to edit the Main Page). History. This tab allows readers to view the editors of the article and the changes that have been made. Watch. Clicking on the watch tab will cause any changes made to the article to be displayed on the watchlist. (Note: when this tab is clicked, it changes to an unwatch tab.)

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