This option keeps spans between points straight when you edit a point.
To enable this option:
- Select a curve, or points on a curve.
- Right-click the object, and select Keeping Straightness of Spans from the context menu.
When this option is selected, and you edit a point that is at the end of a straight span, the straightness of the span is preserved:
If this option is deselected, the straightness of the span is not preserved:
Note: If three points are collinear and you edit the middle point, the straightness is never preserved.