The dRofus Property Panel is a contextual panel - i.e., if a linked Zone is selected, (and if already linked) it the dRofus Panel will display the corresponding dRofus Room's properties ( and if the Zone is not already linked) , it will give you the option to link to a corresponding dRofus Room.
Likewise, if an a linked Object is selected, (and if already linked) it the dRofus Panel will display the corresponding dRofus Item's properties ( and if the Object is not already linked) , it will give you the option to link to a corresponding dRofus Item.
Example of (below) showing the dRofus Panel for an ArchiCAD Zone that has already been linked to a corresponding dRofus Room:
Example of an ArchiCAD Object that has not yet been linked to a corresponding dRofus Item:
