Instruction symbols and basic folds

Valley fold

Valley fold line (when folded, the paper sides make a “valley”)

Mountain fold

Arrow indicating direction of fold

Mountain fold line (when folded, the paper sides make a “mountain range”)

Inside reverse fold

Push open the tip, then fold down and in, leaving the tip exposed.

Outside reverse fold

Open up an existing fold about halfway, then swing part over and crease.

Turn over

Next diagram shows the model enlarged