Default Measurement when opening external document

[JevoUK]

Hi

I was wondering if you could add the option to set the default measuring system to documents that where created externally, when we open a document created externally it defaults to points I would like it to default to mm.

Thanks

[GarryP]

See: https://forum.affinity.serif.com/index.php?/topic/211559-please-add-default-document-units-in-global-preferences/

...and other existing requests.