01) Access the Control Panel
02) After login click Configuration >> Orders Setting
How many days after sending the customer sees the button to request return / exchange in my orders) Set the number of days, just fill in number In this field
In the Order status exchange after customer request row, choose a status after the customer requests the exchange so that the order remains in this status
In the Order status return after customer request line, choose a status after the customer requests the return so that the order remains in this status
In the Order status shipped to the return / exchange button in my orders line, choose the Sent status so that the customer can see the exchange / Return after shipment
03) To change click on options >> edit
04) After clicking Update