Hello, Torleif67.
Thank you for getting back to us here in Community. In QuickBooks, once you've turned on your multi-currency and set it up, you can't longer change it. Also, you can only assign one currency to each account or contact name, and you have to add a new account for each different currency that you will use in transactions.
Please check these articles how multi-currency gives you the ability to record transactions in foreign currencies and to see different information about Home currency adjustments that can help you when using the Multi-currency feature in QBO:
Please leave a comment anytime if you have questions. I'm always here for you. Have a great day, and stay safe!
