mcshane's planes

Here is a list of some conventions used in this section:

• Evenly dotted line: Fold along this line. This represents a valley fold - the paper should make a valley; the fold being lower than the surrounding paper
• Unevenly dotted line: A mountain fold - ie the fold is higher than the surrounding paper
• Double headed arrow: Fold, then fold back again so the paper is flat, but now with a crease in it
• Single headed arrow: Fold and leave
• Pairs of marked lines: These pairs of line marked with one or two dashes indicate that for the appropriate fold these two lines are supposed to meet exactly when the fold is made