How to inset a face? I am trying to set up a Minecraft rig mouth that will have more controls and will be rounded, but I am having issues trying to figure out what this guy did here. First, he did what looked like a loop cut and slide, but instead of drawing a line it selected all the edges it passed through. He then cut to a new clip where the mouth was already set up like this.



The video is in 3 times speed but if you download a youtube plugin you can slow it down to 0.25 speed of the video and then if you do the spacebar trick you can slow it down so it shows 1 frame at a time and it is really slow. Here is the link if you want or need to see the video.

All I am asking is how can I create those 8 basic segments.
You could use the Inset tool (I):


  This tool takes the currently selected faces and creates an inset of
  them, with adjustable thickness and depth. The tool is modal, such
  that when you activate it, you may adjust the thickness with your
  mouse position. You may also adjust the depth of the inset during the
  modal operation by holding Ctrl.



Select the faces to inset:


Press I to inset: