Pages are renamed by moving them to new target names. This procedure preserves the page's edit history. Please do not rename a page by copying/pasting its content to a new page name. If you have an account that is at least four days old and have made more than 10 edits (autoconfirmed), you can move a page yourself, but please first review Wikipedia:Naming conventions. If you still wish to rename the page, go to it, click the drop-down menu at the top (near the History button and Watchlist star), and choose Move. You can then specify a new name for the article. The old page name will automatically become a redirect to the new page. However, if the desired target page name already exists and is other than a redirect with only one edit, you will need an administrator to move the page for you, which can be requested at Wikipedia:Requested moves. Hope this helps.