I understand that Printmaster 6 Plat does not have an address book and mail merge for making shipping labels for multiple addresses like earlier versions of Printmaster. Is there a workaround?
Yes, there is. Create from a Ready Made Template, choose Avery Template Sheets. As an example, choose 8163 Avery Shipping Labels. The dotted lines show you where each label is positioned, so you can add a text box to each label, then type a different address into each text box.
To change the gray background to white, click Backgrounds, click Color, open the Swatches tab, choose white (very top, left).