As far as I know there are 4 files which could possibly affect the POS receipt:
addons/point_of_sale/report/pos_receipt.sxw addons/point_of_sale/report/pos_receipt.rml addons/point_of_sale/static/src/pos.css addons/point_of_sale/static/src/pos.xml
I've tried changing them all but NOTHING changes on the printed receipt, so frustrating.
Is there another file somewhere else I need to change??