Thread:Extension talk:WYSIWYG/ Show WikiTextEditor not working in MediaWiki 1.22 & WYSIWYG MW v1.20.2

I'm very new to Media Wiki. I've just install the WYSIWYG editor and I'm unable to switch the editor on and off.

I would like to turn it off because I'm trying to edit the SideBar and the WYSIGWYG adds a load of html to the page which I'm unable to turn off by clicking on source. If I commit the page with the HTML in it breaks the sidebar (i.e. nothing is display in the sidebar).