A display apparatus includes a processor configured to execute instructions to: based on an input from a user, select a category from a plurality of categories related to characteristics of a plurality of source devices connectable to an interface of the display apparatus, receive a plurality of pieces of content from at least one source device connected to the interface and corresponding to the selected category, and display a multi-image on a display of the display apparatus, based on at least two pieces of content from the plurality of pieces of content.