page is for those who want the instructions to learn how to apply an unfold.
Unfold or Flat-fold is one of most frequent folding technique you would apply in origami. This technique nullifies previous valley-fold or mountain-fold by flattening any folded crease line.
This is an animated instruction so it would be very easy to follow through. You are not required to have any prior knowledge about origami.
In this site, if you see a line symbol of dotted green line, this means that you need to apply unfold on the particular crease line.