This tab contains the list of all field codes defined in the project. For information on field codes, see Field codes.
To add a new field code
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					Click the Add button. 
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					In the dialog box, specify the name of the field code. 
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					Click Ok. 
To remove a user-defined field code
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					Select the field code to be removed. Only user-defined field codes can be deleted. 
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					Click the Delete button.