AETHER-3263 Update Subscriber and Connectivity Management documentation

Change-Id: I262100022cd12b608129a3308d53e8d215fefdc4
diff --git a/operations/gui.rst b/operations/gui.rst
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+..
+   SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
+   SPDX-License-Identifier: Apache-2.0
+
+Aether ROC GUI Basics
+=====================
+
+This section documents common aspects and features of the GUI.
+
+.. _committing:
+
+Committing
+**********
+To commit the changes
+
+#. Click on the **Basket** icon (2nd icon from top right) to see the Basket view
+#. Inspect the changes to be committed (optional)
+#. Click **Commit** to perform the commit
+#. Observe the response that's temporarily displayed that shows the success or failure of the commit
+
+|BASKETVIEW-NEWRANGE|
+
+History
+*******
+If you are an Aether ROC Administrator, you will be able to see the History of changes, from the *Basket View* by
+clicking on the **History** button.
+
+|BASKETVIEW-HISTORY|
+
+.. note:: The *History* button will only be visible if you are in the **AetherROCAdmin** group.
+
+.. |BASKETVIEW-NEWRANGE| image:: images/aether-roc-gui-basket-view-new-range.png
+    :width: 635
+    :alt: Basket View with some changes ready to be committed
+
+.. |BASKETVIEW-HISTORY| image:: images/aether-roc-gui-basket-view-history.png
+    :width: 800
+    :alt: Basket View with history of last changes