Purpose
Usage
Click the weight button to activate it, then activate the control
point whose weight you want to change. By holding the middle mouse button down
while moving the mouse horizontally, the weight of the currently active point
will change. If the keyboard toggle button is active, you must enter numerical
values.
Comments
The stronger the weight for a control point, the more the curve will be
pulled to the position of that control point. However, the effect is relative to
the weights of the surrounding points, so that if the weight of all points of a
curve are doubled, the curve stays the same.