Curve Ordering

The default ordering scheme comes from manufacturing turning operations, where the workpiece is set up as shown in the image above. The Z-axis is aligned with the turning axis and the tool bit moves from the most positive Z location to the most negative Z location. The start and end points in curve chains begin at the largest positive Z value and move toward lesser Z values.

The default ordering scheme is used when you box-select the curves.

Individually selected curves (using the Ctrl key), or curves selected by range (select the start curve then Shift-select the end curve), are ordered in their selection order.

Randomly selected curves, that were selected without curve order in mind, will be ordered using the default scheme.