Paul,
yes, please check this property:
Editor.EditCompleteDocument Property
Specify whether a complete HTML document is being edited.
Remarks
If false, the editor will only process content inside the page body i.e. all content inside of the <body>...</body> tags of a page. If true, the editor will process content outside the page body and preserve header tags (e.g. <head>...</head>, <title>...</title>, etc.).
Demo:
asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx