An electronic device comprising: a display; an input device; at least one sensor module; and a processor, wherein the processor is configured to: control the display to display a plurality of identifiers, each of the plurality of identifiers comprising one or more of a border, a figure, or a thumbnail image to indicate an associated candidate area for displaying content, based on detecting, through the input device, a user input for selecting at least one candidate area from among the plurality of candidate areas indicated by the plurality of identifiers, control the display to display, on the at least one candidate area, first content, control the at least one sensor module to identify a movement of an external object visible through the display, in response to determining that the identified movement is a movement to provide second content related to the first content, control the display to display, on the display, the second content (1515, 1615, 1715) related to the first content at a position in relation to the external object based on at least one of a locational movement or a shape change of the external object, wherein the second content (1515, 1615, 1715) includes at least one of moving image data or still image data; wherein the second content is displayed to at least partially overlap the first content; and wherein the second content includes control content for controlling the first content. a display; an input device; at least one sensor module; and a processor, wherein the processor is configured to: control the display to display a plurality of identifiers, each of the plurality of identifiers comprising one or more of a border, a figure, or a thumbnail image to indicate an associated candidate area for displaying content, based on detecting, through the input device, a user input for selecting at least one candidate area from among the plurality of candidate areas indicated by the plurality of identifiers, control the display to display, on the at least one candidate area, first content, control the at least one sensor module to identify a movement of an external object visible through the display, in response to determining that the identified movement is a movement to provide second content related to the first content, control the display to display, on the display, the second content (1515, 1615, 1715) related to the first content at a position in relation to the external object based on at least one of a locational movement or a shape change of the external object, wherein the second content (1515, 1615, 1715) includes at least one of moving image data or still image data; wherein the second content is displayed to at least partially overlap the first content; and wherein the second content includes control content for controlling the first content. control the display to display a plurality of identifiers, each of the plurality of identifiers comprising one or more of a border, a figure, or a thumbnail image to indicate an associated candidate area for displaying content, based on detecting, through the input device, a user input for selecting at least one candidate area from among the plurality of candidate areas indicated by the plurality of identifiers, control the display to display, on the at least one candidate area, first content, control the at least one sensor module to identify a movement of an external object visible through the display, in response to determining that the identified movement is a movement to provide second content related to the first content, control the display to display, on the display, the second content (1515, 1615, 1715) related to the first content at a position in relation to the external object based on at least one of a locational movement or a shape change of the external object, wherein the second content (1515, 1615, 1715) includes at least one of moving image data or still image data; wherein the second content is displayed to at least partially overlap the first content; and wherein the second content includes control content for controlling the first content.