Crane Model Step 4

Make the bottom edge pointy, flatten going up.

If all is will, you have a tall diamond. Turn the right flap
like a page in a book.
 

Flip a flap of the model, like turning a page of a book. Turn over, and repeat in the same direction.

Turn the model over, and once again, turn the right flap like a
page in a book.
 

Alternately, lift pinch the top two pages between your pointer finger and thumb, and turn your wrist 90 degrees.

If the "page turning" doesn't make sense, try this. Close the
top two flaps together, pinching them between your thumb and
finger, and leaving to more flaps behind.
 

With your thumb on top, flatten the model.

Turn your wrist until your thumb is on top, and flatten the
model.