Open the reservation you want to extend or update.
Go to the Properties tab.
Under Arrival and Departure, make your changes then click
Apply cancellation fee checkbox will be preselected by default depending on the cancellation policy in your rate group; check or uncheck it to choose whether the fee will be applied.
Tip: make sure that a) there is availability left for the extended dates (to avoid overbookings) and b) the room is available for the extended dates (to avoid guests having to switch rooms mid-stay).
Check our our Mews Uni video for more info!