What's the difference between a Note, a Credential, and a Document?

- **Note**: free-form text, useful for instructions, last wishes, or context for your executor.
- **Credential**: a label + username + password (or secret). Credentials get extra protection like masking and optional step-up authentication before viewing.
- **Document**: one or more file attachments (PDF, image, etc.) with a title and optional summary.

You can change an item's type later, though attachments only travel with Document items.