Fill Values dialog box

Sets the selected coordinate component of all points on a curve to the same value.

Point Component to Fill

Specifies value to apply and the coordinate direction to apply it to.

Fill to X Coordinate Set the x coordinate of points with the value specified in Value to Fill.
Fill to Y Coordinate Set the y coordinate of points with the value specified in Value to Fill.
Fill to Z Coordinate Set the z coordinate of points with the value specified in Value to Fill.

Value To Fill

The value to set the selected coordinate component of all points on the curve