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Follow the below steps:
1) Search & Go to "Currencies"
Click the Exchange Rate
Set the Local Currency's "Fix Exchange Rate Amount" = Both
2) Create a Sales Order, filling up the basic information
23) Go to “Invoice Details", adjust the exchange rate by clicking the right-side detail box and turn on the box "Use Hedge Rate" if users want to fix the exchange rate for this sales order
34) Release the Sales Order and drop the PO
45) For the PO, do the same procedure if needed.
56) Create a new Group Shipment and add shipment line from the picker. The fixed PI/ SI Exchange Rate will be showed.
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