To Place a FreeForm Surface with Data Points

Select
Bspline Surface tool (
).
 Enter a series of data points to define the first row (in the udirection).

Reset to complete the first row.
The number of data points in the first row must be greater than or equal to the Order in the udirection.
 Enter more data points to define other rows. After the same number of data points is entered, as is in the first row, the row is completed and a new row is started.

Reset to complete the definition.
If at least as many rows as the Order in the vdirection are completely defined, a Bspline surface is generated.