Docbox allows you to include electronic inserts with your documents. This can be used to add a promotional leaflet or terms and conditions page, for example, without that content needing to be part of the original document.
Up to three inserts can be assigned to a printer and are added after the main document pages, in order. All jobs sent to that printer will have the inserts included.
Electronic inserts are configured in Control Panel > Electronic Inserts. Refer to Electronic Inserts for configuration detail.