In a mobile communications terminal 100, there is provided a gestural control application for associated operation with an image viewing application. The gestural control application is configured to receive user gestures inputted through a touch-sensitive display of the apparatus when one or more images is displayed by the image viewing application. The gestural control application is configured to identify a correspondence between a received gesture and one of a plurality of locally-stored reference gestures and to identify selection by means of the inputted gesture of one or more entities in the or each image. By means of this identification and selection, said application is configured to communicate and apply a function associated with the identified reference gesture to an external web site through which is accessed a predetermined social network application, the function being applied in relation to the selected one or more entities.