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They are composed and selected in the Laws Editor which is specific to each tool that uses laws and can be opened from that tool.

To use a the Surface from Laws tool:

1. Select the tool. The Laws Editor opens.
2. Select the desired law in the Laws table by double-clicking and press OK. The law that is applied is what is in the formula field.
   
3. Set the U-min, U-max and V-min, V-max either by entering a values in the Inspector Bar or by selecting two points. (U-min and V-min default to zero (0))
    
    
    

To create a law:

1. Type the desired formulas into the formula fields.
   
2. Press the + (plus) button.
    
3. Type in a titke for the law and press OK.
   The new law will appear in the Laws table
    

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 Laws cannot be edited but double click a law will load it into the Formula fields where it can be altered and then a new altered law added.

Editing a

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Surface by Law

The values for a Curve Surface by law can be edited via the Selection Info palette or by the object properties.

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