How do you replicate a field's data throughout a document?

Welcome to DocuSign and the Community, 

Yes, you can use our Repated Data Fields feature.  Just be sure that  (http://fast.wistia.net/embed/iframe/yi2ot79b37?popover=true) Custom Fields have the same Labels ,

*Please Note:   If you are uploading multiple documents or using multiple templates, you should be aware of the Data Population Scope setting for your account.

• If the account setting is  Envelope ,  fields with the same "Data Label" will populate with the same data when a recipient enters or modifies information in the field  for all documents  in the envelope.
• If the account setting is  Document , only fields with the same " Data Label" and  in the same document  will populate with the same data when a recipient enters or modifies information in the field.

This setting can be changed in (https://support.docusign.com/guides/ndse-user-guide-switch-to-the-classic-docusign-experience) Classic DocuSign  >> Preferences >> Features >>   Data Population Scope:     Envelope    

Happy DocuSigining,  

Marc