Abstract: A method of multimedia (video, graphic, audio etc) data processing, comprises assignment of an area in the demonstration medium for receiving viewer's commands during the multimedia information demonstration process, for linking external applications, currently executed application, for an external application data placement and/or the results of work thereof. If the demonstration medium does not have a graphical representation, the assigned area is defined as a set of parameters, an interval of parameters, a group of parameters. A multimedia application of any type as well as the results of work thereof can be placed into the assigned area. A method for the formation in the demonstration medium contours of the assigned area which tracing an object of a complex shape in the displayed image, comprises the assigned area formation by one or more piecewise smooth arcs, adjusted to achieve the best coincidence with the contours of the traced object.