Before today if you made a mistake making a comment on a friend's wall the only thing Facebook would let you do to correct the error was delete the comment and write it again.
But starting last week Facebook let users edit their comments. The edit option appears in the form of a small pencil icon next to a comment. Clicking on the pencil will bring up a drop-down menu with the option to edit the comment as well as the option to delete . Edited comments will still be "showing the editing history for a comment so that subsequent commenters or have the full context of the conversation." That way if someone responds to a comment that gets edited commenters in the future can see the history of the conversation and not get lost.
