Thank you for your suggestion. This is actually something that is already in development for AccuZIP6 5.0 that uses a "Wizard" based option to create a label templates and add and remove fields within the template. The interface is similar to MS Word's Mail Merge feature that allows you to view the fields in your datasource and drag and drop them into the template.
Thank you for posting!
Editing a Template in the Label Designer Feature Request.
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