Allows you to create a keypoint arc by putting down the two end points and specifying either the center or radius of the arc.
Specifies the degree of the curve. The values range from 2 to 7. The default is 6.
Specifies the number of spans in the curve. The values range from 1 to 14. The default is 1.
The sum of the degree and number of spans cannot exceed 16. When creating rational geometry, as set in Preferences > Construction Options , the Spans option is not available.