Modify a custom label format
If, after saving the format and exiting the label editor, you wish to make any changes, select it in the print dialog and click on the Modify button. The label editor appears: click on the Load button and select the format temporarily saved on the desktop.
Once you've made your changes, click Save to save them. Give the original format name to the file on disk and confirm. The new version of the print format is stored by the program.