• If you are an editor, log in to edit the page.
• If you are not an editor, become an editor.
• Click Edit this page.
• Write the page content, and click Save to create the page.

You cannot create homepages this way. To create homepages, contact an admin-level user.

When creating new pages, always ensure that there is some other page that links to the newly created page. Otherwise your page will just become a wiki orphan that will be quickly forgotten.