A “document” in Cronenta is a page you write yourself, right inside the app: your terms of service, your cancellation policy, whatever you want a client to read. It’s not a place to upload a PDF or collect a signature.
Write it once under Documents, then attach it to one or more appointment types from the Appointments screen, and it’ll be shown to a student booking that type.
The same screen has a separate Images section, but that’s for pictures on your landing page. Those are unrelated to documents; the two just share a screen.