Instagram has a cool new feature that only appears after you wait 5 seconds

Instagram loves to secretly test new features on some of its users and get feedback before deciding on whether it should roll them out for everyone.

But over the last few weeks, the company added a new commenting feature that you won't see unless you look at a post for more than five seconds.

Before you go ahead and try it, make sure you update the app to the latest version.

Once you've done that, go to your Instagram feed and scroll down to a post. Wait five seconds and you'll should see an "Add a comment..." box appear, like so: Read more...