Moving a reservation to a different room type is quick and easy and can be done in two ways, through the calendar and through the reservation card.

Reservation Card

Navigate to the reservation card of the reservation you want to move to a new room type.
Click on the room and select "Edit room"
Change the room type, then select a new room number and save.

Note: the rate should not change unless you select the reset button above the total rate.

Calendar

Navigate to your calendar. Find the reservation you want to move.
Right click on the reservation, hover over "Quick move" and select the new room number for the room type.
Note: all the rooms that are above the line Other Rooms are the same room type as the reservation is in, everything under that line is a different room type.