The numeric annotation system is used to number the direction or flow of directional inputs. This system is typically used for games that require precise inputs.
For an example on how the numeric annotation system is numbered, a numpad is a great example:
On a joystick 5 would be neutral, 2468 would be cardinal directions, and the rest would be diagonals. These inputs can be combined for more complex ones such as 214(quarter circle), 623(z input), and 3412361(pretzel input)
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