Origami crease patterns serve many purposes: to the designer, they provide a structural representation of the artwork. To a folder, they can provide signposts on the way to a fold. To the everyday viewer, they provide an alternate way of looking at the folded subject: in a crease pattern, you can see everything that is hidden in the folded work.
![Crease Patterns](https://cdn-ak-scissors.b.st-hatena.com/image/square/80255b85b89dda1f17f597766380d6719d7ea98e/height=288;version=1;width=512/https%3A%2F%2Flangorigami.com%2Fwp-content%2Fuploads%2F2018%2F08%2Ffacebook-image.jpg)