Lookup Table
On the File | Lookup Table Editor tab, in the Lookup Table group:
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Click Save and Compile to save the current lookup table and then compile it.
 
                                                
                                            
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Click Save and Compile to save the current lookup table and then compile it.
 
                                                
                                            
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Click Add Level to add a level to the end of the current lookup table.
 
                                                
                                            
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Click Remove Level to remove a level from the end of the current lookup table.