Few days back Facebook has rolled out a new commenting system for its users. Earlier it was not possible to edit your comments once you have submitted them. But with new commenting system it’s possible to edit your comments on Facebook.
If you are an active Facebook user and comment a lot on your friend’s wall then you might have noticed that there is no submit button to submit comments for past few days. They have removed the submit button in new commenting system. Now you just need to press enter to submit the comment or Shift + Enter to start a new line. I think they have introduced this feature to speed up the process of commenting. Users can submit the comment immediately while typing from keyboard without touching the mouse buttons.