A graphical user interface for the monitoring and/or controlling of a computer controlled dairy farm system, or part thereof, by a human user, is disclosed, which includes a computer based graphical and schematic representation of the dairy farm system, or part thereof, where the representation includes objects, each of which represents a respective part of the dairy farm system, or part thereof, and having at least one associated physical property, wherein the physical property associated with the respective object is included among physical properties of the respective represented part of the dairy farm system, or part thereof. Each physical property which is included among the properties of the respective represented part of the dairy farm system, or part thereof, is preferably chosen from the group of spatial location, size, shape, color, direction, movement, amount, rate, frequency and distance from other objects.