Methods of managing a parameter displayed in an interactive graphic object

Method of managing a parameter displayed in a first interactive graphic object by means of an interactive touch screen avionics display device, said first graphic object having an appearance delimited by a frame, a behaviour and a functional interface, a computer making it possible to interpret the actions carried out by a user by means of a graphic pointing device, the pointing device comprising means of selecting the first graphic object, the pointing device being able to be overlaid on the first graphic object on the interactive touch screen avionics display device, wherein the method comprises:

• a first step for positioning the pointing device in at least one point of the frame of the first graphic object;
• a second step for activation of the means of selecting the first graphic object and of moving the pointing device in a determined area of the interactive touch screen avionics display device, the displacement of the pointing device engaging the displacement of the first graphic object, a second graphic object appearing in the initial position of the first graphic object, the second graphic object comprising a history of the parameter, wherein the history comprises a stack having a predefined number of the latest values of the parameter, the value included in the graphic object that has just been deleted being stored in the stack for allowing a crew member to retrieve and display the preceding value of the parameter after the latter has been modified.