A display apparatus that includes circuitry that displays a user interface screen including device information that identifies a plurality of output device groups and a plurality of input device groups to control connection between one of the output device groups and one of the input device groups; and receives an input that designates a combination of said one of the output device groups and said one of the input device groups, the user interface screen includes a matrix comprising a plurality of cells in a row direction and a column direction, the input designates the combination by designating one of grouped cells corresponding to the combination of said one of the output device groups and said one of the input device groups in the matrix, and the grouped cells are grouped such that the input designates the combination as a group.