A display apparatus, comprising a controller, and comprising a transparent touchscreen, a mode adjustment panel, and a main display screen that are arranged in a stacking manner, wherein the mode adjustment panel is located between the transparent touchscreen and the main display screen; the main display screen is configured to display a first application interface; the transparent touchscreen is configured to display a second application interface; the controller is configured to: determine a first shielding region on the mode adjustment panel based on a first interaction region in the second application interface, and control the mode adjustment panel to display the first shielding region at preset transparency, wherein the first shielding region is used to shield a part of the first application interface, so that the part of the first application interface is displayed at the preset transparency and superimposed with the first interaction region, wherein the preset transparency is less than or equal to 85%; and the controller is further configured to: obtain a touch operation detected by the transparent touchscreen, wherein the touch operation is used to trigger the display apparatus to exchange and display the first application interface and the second application interface; control, based on the touch operation, the main display screen to display the second application interface, and control, based on the touch operation, the transparent touchscreen to display the first application interface; determine a second shielding region on the mode adjustment panel based on a second interaction region in the first application interface; and control the mode adjustment panel to display the second shielding region at the preset transparency, wherein the second shielding region is used to shield a part of the second application interface, so that the part of the second application interface is displayed at the preset transparency and superimposed with the second interaction region. the main display screen is configured to display a first application interface; the transparent touchscreen is configured to display a second application interface; the controller is configured to: determine a first shielding region on the mode adjustment panel based on a first interaction region in the second application interface, and control the mode adjustment panel to display the first shielding region at preset transparency, wherein the first shielding region is used to shield a part of the first application interface, so that the part of the first application interface is displayed at the preset transparency and superimposed with the first interaction region, wherein the preset transparency is less than or equal to 85%; and the controller is further configured to: obtain a touch operation detected by the transparent touchscreen, wherein the touch operation is used to trigger the display apparatus to exchange and display the first application interface and the second application interface; control, based on the touch operation, the main display screen to display the second application interface, and control, based on the touch operation, the transparent touchscreen to display the first application interface; determine a second shielding region on the mode adjustment panel based on a second interaction region in the first application interface; and control the mode adjustment panel to display the second shielding region at the preset transparency, wherein the second shielding region is used to shield a part of the second application interface, so that the part of the second application interface is displayed at the preset transparency and superimposed with the second interaction region.