How to create purchase orders in a different currency?

To create purchase orders in a different currency than your company's base currency requires the multi-currency setting to be enabled. Please refer to this article to enable multi-currency.

Setting up supplier currency

Once you have enabled the multi-currency setting, you can set up a default currency for your vendors. To do this, simply navigate to Purchase -> Vendors, and in the Invoicing/Accounting tab of the vendor form set the Supplier Currency field to the required currency. If the supplier uses the same currency as your company's default currency, then you may leave this field blank.

Setting up currency on vendor pricelist

You will also be able to set up vendor pricelists in a different currency than your base currency once the multi-company setting has been enabled.

Using currencies on purchase orders

The currency selection will also be available in the purchase order form.