docs: added documentation for restricted records

 * closes inveniosoftware#532

docs/features/features-walk-through/metadata_only.md

@@ -0,0 +1,9 @@
+# Metadata-only records
+
+A metadata-only record is a record that contains only descriptive metadata, and no associated files. These types of records can be useful in cases where the resource does not have a corresponding digital object or its files are hosted elsewhere.
+
+The site administrator can choose to enable or disable the creation of metadata-only records. For more on that, see [this section](../../customize/metadata_only.md).
+
+To mark a record as metadata-only, simply select the "Metadata-only record" checkbox when creating a new record:
+
+![Setting Metadata only](./img/meta_data_only.png)

docs/features/features-walk-through/restricted_records.md

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+# Restricted records
+
+A record can be marked as restricted in order to restrict its access to specific users. This is useful for example to share a record with a colleague or team before making it public.
+
+## Setting a record to be restricted
+
+When creating or editing a record, click the "Restricted" checkbox under "Full record" in the "Visibility" section of the form to make the entire record -metadata and files- restricted:
+
+![Visibility Options](./img/visibility_options.png)
+
+To **only** make the files restricted, click the "Restricted" checkbox under "Files only" in the "Visibility" section.

mkdocs.yml

@@ -55,6 +55,8 @@ nav:
           - Site banners: "features/features-walk-through/banners.md"
           - Notifications: "features/features-walk-through/notifications.md"
           - Access requests: "features/features-walk-through/access_requests.md"
+          - Restricted records: "features/features-walk-through/restricted_records.md"
+          - Metadata-only records: "features/features-walk-through/metadata_only.md"
   - Install:
       - Quick start: "install/index.md"
       - System requirements: "install/requirements.md"