Editing SignWriting (section)

=== Finger movement ===

There are only a few symbols for finger movement. They may be doubled to show that the movement is repeated.

A solid [[bullet (typography)|bullet]] represents flexing the middle joint of a finger or fingers, and a hollow bullet represents straightening a flexed finger. That is, a 'D' hand with a solid bullet means that it becomes an 'X' hand, while an 'X' hand with a hollow bullet means that it becomes a 'D' hand. If the fingers are already flexed, then a solid bullet shows that they squeeze. For example, a square (closed fist, 'S' hand) with double solid bullets is the sign for 'milk' (iconically squeezing an udder).

A downward-pointing chevron represents flexing at the knuckles, while an upward-pointing chevron (^) shows that the knuckles straighten. That is, a 'U' hand with a down chevron becomes an 'N' hand, while and 'N' hand with an up chevron becomes a 'U' hand.

A zigzag like two chevrons (^^) joined means that the fingers flex repeatedly and in sync. A double-line zigzag means that the fingers wriggle or flutter out of sync.