Hi,

here are all info what and how to do it: https://www.odoo.com/documentation/16.0/developer/tutorials/backend.html#view-inheritance 

Hi,

Yes directly editing the view architecture is not good method and as you said it will get overridden while upgrading the app.

If you need to do it from the ui itself, you can create an inherited view of the original view and then you can apply changes there.

See a sample here: https://www.youtube.com/watch?v=9Sy2SxQEkSk

If you need to do it from code, you can also try it, see: https://www.youtube.com/watch?v=46yecsKX2tw

Thanks