1. Open the target Job Jackets file in a text editor.

2. Locate the <MasterPage> element for the desired master page and change its 'Default' attribute to 'Yes'. For example:

<MasterPage ID='MasterPage_1' Name='A-Master A' Status='Available' BottomMargin=' Columns=' Default='Yes' FacingPages=' GutterWidth=' IncludeGridAttributes='Yes' LeftMargin=' RightMargin=' TopMargin='>

3. Use this Job Jackets file to construct the layout.