What is a Mountain Fold?

The Basic Idea:

Mountain fold summary

The mountain fold is shown by a dash-dot line.
Sometimes there is an arrow (with a half-triangle tip)
showing the folding direction.
Fold part of the paper away from you,
and crease along the dash-dot line.

Try to make the edges (or other reference points) line up exactly
(except if the diagrams tell you to leave a gap).

The mountain fold gets its name because if you unfold,
the crease will look like a mountain ridge.

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A traditional fold. Diagrammed by Jasper in 1999.
Copyright 1995-99 by Jasper (aka John Paulsen). Your comments are welcomed.
Last updated July 23, 1999.