Instagram testing a new method allowing you to comment directly from the main photo feed
It appears as though Instagram is pushing this new feature out to Android users this week via a server-side update. Those rockin' iOS have already received this new capability starting last month. It is a good idea because if you are so taken by an image in your feed that you can't keep your eyes off of it, odds are that you have something to say about it.
If you stare at a photo that is posted in your main feed and nothing happens, you can safely come to the conclusion that the update has not yet come your way. You can keep staring every now and then, or you can wait to see if Instagram makes an announcement when it has completed rolling out the new feature to all iOS and Android users. And if you use this new feature often enough, you too can become a "stare master."