1, enter the computer setup interface. 2. Select the "System" option in the upper left corner. 3. Click the "Test" button to connect. 4. Select advanced display settings. 5. Change the adaptive settings of the monitor. 6. Change the screen resolution of the projection screen. Turn on the screen projection function of the large-screen device to be connected, and then we will go back to the mobile phone and slide the notification bar at the top to see the wireless screen projection function. After clicking this function, the mobile phone will search for nearby devices. After the name of the big screen device to be linked is displayed on the mobile phone, select Connect to complete the screen projection.