LibreOffice how to archive a custom label definition?

I have Avery 8160 compatible labels. I had to modify 3 parameters of the Avery 8160 definition to get label printing to line up. I saved the definition as “8160 - custom Epson ET-2550”. I would like to archive this label definition to add back into LibreOffice later.

Version: / LibreOffice Community on Arch Linux