Tagging someone on Instagram is pretty straightforward. If you’re viewing an Instagram photo you really like that you want to share with a friend, you can simply tag them in the comments and they'll receive a notification. But did you know you can also send an Instagram picture as a dm, or direct message? If you choose this option, it's more private because you don't have to mention them in the public comments. Let's learn how to direct message a picture on Instagram, or how to just tag someone on an Instagram photo without sending them a dm.