A display apparatus, comprising: a display configured to display a plurality of icons corresponding to a plurality of speakers; a communicator configured to communicate with the plurality of speakers; and a processor, wherein the processor is configured to: move, according to a touch interaction, a first icon of the plurality of displayed icons corresponding to a first speaker of the plurality of speakers towards a second icon of the plurality of displayed icons corresponding to a second speaker of the plurality of speakers; characterized in that the processor is further configured to: provide an animation effect to change a shape of the first icon and the second icon, wherein each of the first icon and the second icon comprises an information display area (212-1, 212-2) and an edge area surrounding the information display area (212-1, 212-2), and provide visual feedback (811, 812) that an edge area of each of the first icon and the second icon is extended in a direction toward one area between the first icon and the second icon, if the distance between the first icon and the second icon no longer exceeds a predetermined first threshold distance; wherein the processor is further configured to: provide visual feedback that the extended edge areas are connected with each other if the distance between the first icon and the second icon no longer exceeds a second threshold distance, the second threshold distance being shorter than the first threshold distance; and wherein the processor is further configured to: provide visual feedback to surround the information display area (212-1, 212-2) of each of the first icon and the second icon while each of the edge areas are united to one area and to interlock operations of the first speaker and the second speaker, such that a content output by the first speaker is output by the second speaker, if the distance between the first icon and the second icon no longer exceeds a third threshold distance, the third threshold distance being shorter than the second threshold distance. a display configured to display a plurality of icons corresponding to a plurality of speakers; a communicator configured to communicate with the plurality of speakers; and a processor, wherein the processor is configured to: move, according to a touch interaction, a first icon of the plurality of displayed icons corresponding to a first speaker of the plurality of speakers towards a second icon of the plurality of displayed icons corresponding to a second speaker of the plurality of speakers; characterized in that the processor is further configured to: provide an animation effect to change a shape of the first icon and the second icon, wherein each of the first icon and the second icon comprises an information display area (212-1, 212-2) and an edge area surrounding the information display area (212-1, 212-2), and provide visual feedback (811, 812) that an edge area of each of the first icon and the second icon is extended in a direction toward one area between the first icon and the second icon, if the distance between the first icon and the second icon no longer exceeds a predetermined first threshold distance; provide an animation effect to change a shape of the first icon and the second icon, wherein each of the first icon and the second icon comprises an information display area (212-1, 212-2) and an edge area surrounding the information display area (212-1, 212-2), and provide visual feedback (811, 812) that an edge area of each of the first icon and the second icon is extended in a direction toward one area between the first icon and the second icon, if the distance between the first icon and the second icon no longer exceeds a predetermined first threshold distance; wherein the processor is further configured to: provide visual feedback that the extended edge areas are connected with each other if the distance between the first icon and the second icon no longer exceeds a second threshold distance, the second threshold distance being shorter than the first threshold distance; and wherein the processor is further configured to: provide visual feedback to surround the information display area (212-1, 212-2) of each of the first icon and the second icon while each of the edge areas are united to one area and to interlock operations of the first speaker and the second speaker, such that a content output by the first speaker is output by the second speaker, if the distance between the first icon and the second icon no longer exceeds a third threshold distance, the third threshold distance being shorter than the second threshold distance.