Adding codes to filters for attachments
You can assign document codes in the Filter form. This form controls the codes that are displayed to users.
See Data filters.
Filter security does not apply to the 
		INSTRUC code. Instructions are always read-write unless
		object or ACL security prevents it. 
	 
The 
		INSTRUC document code is visible for items in the 
		Notes tab of the object form.
		This document code is not visible for formulas and specifications.