Board Thread:Support Requests - Getting Started/@comment-986105-20130417215924/@comment-366087-20131221080046

What that, the screencap, means is the editor is in *forced* Source Mode. This happens when the coding on the page is too complex for either the VE or Classic editors to handle.

As mentioned though, ensure both the wiki has VisualEditor enabled, *and* that your personal preferences has on the Editing tab the option "Enable Visual Editor (where available)" selected (if you want it) or deselected (always use Source Mode). It affects both Visual Editors.