Template:WYSIWYG editing on and off

Default setting is for WYSIWYG visual editing (also called rich text editing). For Wikipedia-style editing click on the rightmost button-icon in the toolbar in the editing window. Place your cursor over it and you will see it labeled "View Wikitext". To go back to visual editing click the right-most button again (now labeled "View Rich Text".

To turn off WYSIWYG visual editing altogether logged-in users can go to their preferences. Go to the edit menu and uncheck "Enable Rich Text Editing," and save the settings. To turn it back on check the box and save the settings.

To disable WYSIWYG editing of a particular page put  __NOWYSIWYG__  at the top of the page, and save the page.