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By U and V parameters |
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Option to specify the position of the point By U and V parameters 
is used when the relative displacement values are known, or when it is necessary to simply create a point lying on the theoretical surface of the face.
On the selected face, a phantom of its theoretical surface is displayed as a grid of intersecting isoperimetric curves. On the phantom are shown:
•by arrows – influence directions of the U and V parameters at the start point U=0, V=0;
•by dotted lines – phantoms of the U and V parameters at the point of indication.
Set the U and V values in the field UV parameters, % on the Parameters Panel.
