When assigning a room you will see a few icons if the room is occupied and if it is dirty or clean.
NOTE: The Housekeeping feature must be enabled for this to show up.
Assigning a room
Occupied: Guest in the room
Dirty or Clean: Based on the Housekeeping status is the Room clean or is it dirty
Room status on the Calendar
The CLEAN or DIRTY status will be reflected for each room on a calendar if Housekeeping module is enabled. Status can only be changed in Housekeeping menu.