1. Find the reservation that you want to switch room for.
2. Go to edit mode by pressing 'Edit' at the top right of the page.
3. Find the room you want to switch and press 'Switch Room'.
4. A pop-up will appear that will list all available rooms for the date of the original room reservation. If the room is checking in today, there will be an icon showing the housekeeping status of the room. Red (X) if room is dirty vacant, magenta [X] if dirty/not checked out and green check mark if it is clean (see next image below). Switching room for arrivals after today will not show cleaning status (see second image below).
You can filter by 'Preferences' and change the order rooms as listed in, you can check the check box 'Show overbooking' if you want to move the reservation to an overbooking room.
5. Click the room number to select the room you want to switch to.
6. In case the guest is already checked in to the old room he will be checked out from that room and it will be marked as dirty / vacant. In this case you will also see the 'Split date' drop down which shows you on which date the reservation will be splitted.