Apparatus and method for display

PURPOSE: A display and a displaying method are provided to automatically convert an input units to another and share a USB device connected to a monitor hub and a USB device connected to a PC main body when multiple PCs are connected to one monitor. CONSTITUTION: While an operation result of the first USB system among a plurality of USB systems is being displayed on a display, predetermined menus through which a USB device to be shared is selected and the second USB system to which the selected USB device is selected are provided(301). When the USB device to be shared and the second USB system have been selected(302), a driver of the first USB system corresponding to the shared USB device is disabled(309). Information transmitted from the shared USB device is buffered in the display(311). The buffered information is transmitted to a driver of the second USB system corresponding to the shared USB device(314).