An XSLT Parameter Set is a set of particular values of the XSLT stylesheet parameters that controls the view of a document in the Editing Window in the WYSIWYG mode.
XSLT Parameter Sets depend on the Document Type. Every stylesheet has at least the Default View parameter set - the values that are specified in the stylesheet itself.
Switch between available XSLT Parameter Sets by changing the top-level XSLT parameters of the stylesheet in use.
On the toolbar, find a drop-down list with the inscription Default View.
Select the Clean set from this list to set the alternative XSLT Parameter Set which removes the draft areas.