The XML file you want to assign a CSS stylesheet to should be open in the active
document window.
Place the cursor on the line where you want to insert the
xml-stylesheet element
(this should be between the XML declaration and the root element).
On the Style menu, click Assign CSS
to XML File.
The
Assign CSS Stylesheet dialogue box is displayed.
Select the CSS file you want to assign and click Open.
The xml-stylesheet declaration is placed in the XML file.
An Example of a CSS stylesheet named "new.css" being assigned to an XML
file named "new.xml"