To enable 4K resolution on your monitor, you need to ensure that both your monitor and the device (e.g., computer, gaming console, etc.) connected to it support 4K resolution. Check your device’s graphics settings and make sure it is set to 3840 x 2160 (4K resolution) if you have a standard 4K monitor. For some monitors, you may also need to enable 4K through the monitor’s own settings menu or software.