Method of operating a home automation system comprising: at least one home automation equipment item of a building, the home automation equipment item being associated with a specific equipment control means, a device for controlling this home automation equipment item, comprising a display and control screen on which a portion of the screen is assigned to the display of a first graphic representation, associated with this equipment item, the control device being separate from the specific control means, which system comprises a step for setting at least one value of a parameter of the home automation equipment item involved in the definition of a scenario, this setting step being able to be both implemented by action on the specific control means so as to cause a phase for modification of the state of the home automation equipment item and by action on the control device so as to cause a phase for modification of the appearance of the first graphic representation of the home automation equipment item.