HDMI (High-Definition Multimedia Interface) is a popular audio and video interface that allows users to connect their devices, such as laptops and TVs, to each other. If you have a Windows 10 device with an HDMI port and you want to use it to connect to a TV or other display, you will need to enable HDMI in Windows 10 first.

Here is a step-by-step guide on how to enable HDMI in Windows 10:

Plug in the HDMI cable to both your Windows 10 device and the TV or display.

Turn on the TV or display and set it to the correct input source. This will usually be done by pressing the "Input" or "Source" button on your TV's remote control and selecting the correct HDMI input.

On your Windows 10 device, right-click on the desktop and select "Display Settings" from the menu.

In the "Display Settings" window, click on the "Detect" button to detect the connected display.

If the display is detected, it will appear in the list of displays. Click on the display and then click the "Identify" button to identify which display is which.

Once you have identified the display, you can choose how you want to use it. You can either extend the desktop to the display, which means that you can use both displays as separate workspaces, or you can set the display as the main display, which means that everything will be displayed on that display. To do this, click on the "Multiple displays" drop-down menu and select the desired option.

If you want to change the resolution or orientation of the display, you can do so by clicking on the "Resolution" drop-down menu and selecting the desired option.

When you are done, click on the "Apply" button to save the changes.

That's it! You have successfully enabled HDMI in Windows 10 and can now use your TV or display as an extended desktop or main display.

It's worth noting that the exact steps may vary slightly depending on your specific Windows 10 device and the TV or display that you are using. If you are having trouble connecting the devices or enabling HDMI, you may want to consult the user manual or online resources for your specific device.

In addition to enabling HDMI in Windows 10, you may also want to make sure that your device is capable of outputting audio over HDMI. Some devices may require you to change the audio output settings in order to hear sound on the TV or display. To do this, right-click on the speaker icon in the taskbar and select "Sounds" from the menu. In the "Sounds" window, click on the "Playback" tab and select the HDMI output device from the list. Click "Set Default" to set the HDMI output as the default audio device.

HDMI is a convenient and easy-to-use interface for connecting devices, and by following the steps above, you can easily enable HDMI in Windows 10 and start using your TV or display as an extended desktop or main display.