You can search for COMP reservations on the Opera screen easily with this method. But you can only find the reservations bound to price codes with the COMP feature with this method.
Open the Update Reservation screen from the Reservation main menu and click the ADVANCED button on the right side of the screen to open the advanced search screen.
On the screen that opens, select a specific date range. Mark the COMPLIMENTARY box on the SEARCH TYPE section and search.