To describe how to make an origami (diagram), symbols are used that are understood by practitioners worldwide. It is essential to master the most common symbols to understand a diagram. On this page, we present this symbolism, which will be so useful for successfully completing your origami.
The solid arrow
means "fold to the front."
The dotted line
means "valley fold."
valley fold

The hollow arrow
means "fold to the back."
The mixed line (alternating dashes and dots)
means "mountain fold."
mountain fold

The curved arrow
means "turn the paper over."
The double arrow
(hollow and solid) means "fold and unfold."
The bouncing arrow
means "fold and refold."
fold and refold

The Z-shaped arrow
means "accordion fold."
accordion fold

The S-shaped arrow
means "inside reverse fold."
inside reverse fold

The rounded double arrow
means "outside reverse fold."
outside reverse fold

The double external Z-shaped arrow
means "double outside reverse fold."
double outside reverse fold

The double internal Z-shaped arrow
means "double inside reverse fold."
double inside reverse fold

The solid arrowhead
means "push in" (to make an inside reverse fold).
inside reverse fold

The short hollow arrow
means "open the paper" (to make an outside reverse fold).
outside reverse fold

The broken arrow
means "redo at the indicated place."
The hollow arrow without fletching
means "enlarged view."