Maybe you feel the need to attach some information to a case before you send it off for signing?
You can add several documents for signing in the same case. After adding an agreement you can add one or many Word/PDF documents containing information, general terms, etc. That way, all signing parties will have access to the same information before signing the agreement.
You can attach as many files as you wish to a case. Keep in mind that the document name may only contain standard characters (A-Z, 0-9 etc).