From the new booking window, next to 'Book Ride' click the green arrow.
This will present you with three options:
'Book & Create Round-trip' to create a round-trip of the ride you just booked
'Book & Copy', to make a duplicate of the ride you just booked.
'Book & Edit', to book a ride and be brought right to the edit ride details screen
Upon selecting either option, a new window will pop up with either the reversed ride information for round-trips, duplicate information for copy, or the edit ride details screen for book & edit.