You can use the Cascading Style Sheet wizard to create a new style sheet. You can also use the wizard to link the new style sheet to an existing style sheet.
To create an external style sheet:
Select File>New.
In the New dialog box, click the Web tab and double-click the Cascading Style Sheet icon.
Follow the instructions in the wizard to complete the entries required.
You can specify a name for the style sheet you want to create and, optionally, you can link it to an existing style sheet. When you click Finish, the new style sheet displays in the standalone Style Sheet editor.
No styles or links to existing style sheets are defined in this style sheet:
