On the Step 3. Template screen, you can add a bar code to your template by clicking the Bar Code button at the bottom of the template area.
You can choose one of the available types of bar codes. The names, font type and data source for each type of bar code can be edited from Settings - Bar Codes.
Once the bar code is in the design area, you can drag, place and resize it to fit your needs. Be careful not to cover other items.
When you have the bar code positioned, click the Save button to save your template.
Later, if you change the rules for this bar code on Settings - Bar Codes, any template that uses this bar code will have the new rules.