To use a green screen on Instagram Reels, first, open the Instagram app and click on the "Reels" option. Next, click on the camera icon in the top left corner of the screen. This will open the camera where you can begin creating your Reel.
To use the green screen effect, swipe left on the camera screen until you see the "Effects" option. Then, type "Green Screen" in the search bar and select the effect from the list of options. This will activate the green screen effect, which will replace the green background with a background of your choice.
To select a background, click on the image icon in the bottom left corner of the screen. This will open a library of images and videos that you can use as your background. You can also use your own images and videos by selecting the "Upload" option.
It is important to note that the green screen effect works best when you have a solid green background without any shadows or other colors. You should also make sure that you are well-lit and have good lighting on your face to ensure the effect works properly.
In summary, to use a green screen on Instagram Reels, open the Reels option in the Instagram app, select the camera icon, swipe left to access the "Effects" option, search for and select the "Green Screen" effect, and choose a background from the library or upload your own. Make sure you have a solid green background and good lighting for the best results.