I believe thats in your webconfig settings:
<add name="CEHtmlEditorProvider"
type="DotNetNuke.HtmlEditor.CEHtmlEditorProvider, DotNetNuke.CEHtmlEditorProvider"
providerPath="~\Providers\HtmlEditorProviders\CEHtmlEditorProvider\CuteSoft_Client\CuteEditor\"
UseDNNRootImageDirectory="true"
RemoveServerNamesFromUrl="true"
UseRelativeLinks="false"
RenderRichDropDown="true"
MaxHTMLLength="0"
MaxTextLength="0"
CustomCulture=""
ThemeType="Office2003"
DisableAutoFormatting="false"
Disabl......................................................................................
No positive as I have not tried it.