How to make 2021 default to Inches on new documents

[Vico Drive]

Just upgraded to 2021.  When I create a new document, I select Inches as my unit of measurement.  Its also set in my preferences/units and incriments as inches.  When I create another new document, it still keeps defaulting to Picas.  How to I permanently change this to stay at inches?

[Jongware · Accepted solution]

Select inches in your Prederences with no document open.

All preferences set without any doc opened are stored as the defaults for all new documents.