If a supplier has their currency set to something other than the Home currency (e.g. EUR or GBP) then their transactions will be entered and stored in that currency (and not in anything else) and will display as that currency in the transaction window.
To display these transactions in the home currency equivalent, choose "Home Value for All Transactions" in the menu on the top right of the transaction list.
To display the supplier's chosen currency values again, choose "Currency Value for (say, GBP) Transactions" in the menu on the top right of the transaction list
Why can't I see home currency value for particular suppliers, they just show in their own currency?
Updated over 2 weeks ago