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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.

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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.
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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))
    
    

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

To Delete a law:

1. Open the Laws Editor.
2. Click on the Law in the Laws table to select it.
3. Right click and select Delete, or press the - (minus) button.
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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.

To Delete all laws:

1. Open the Laws Editor.
2. Click on the Law in the Laws table to select it.
3. Right click and select Clear List.
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To Export laws:

1. Open the Laws Editor.
2. Click Export.
3. Type a file name and click Save.

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To Import laws:

1. Open the Laws Editor.
2. Click Import.
3. Select a file and click Open.

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x(u,v) y(u,v) z(u,v)

In the Offset tool the functions are defined as a function of U and V. Where U is the distance along the x-axis of the object and V is the distance along the y-axis of the object. 

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