Add configuration details to the README

README.rst

@@ -9,6 +9,7 @@ has completed.
 * Usage_
 * Requirements_
 * Installation_
+* Configuration_
 * `Temporarily Disabling Notifications`_
 * Contributing_
 * `Running Tests`_
@@ -73,6 +74,42 @@ Then add this line to your ``.zshrc``. Make sure it is **before** the line ``sou
 
     plugins=(auto-notify $plugins)
 
+
+Configuration
+-------------
+
+*Notification Threshold*
+
+By default, ``auto-notify`` will send notifications for tasks that take longer than 10 seconds. You
+can configure this value by setting the environment variable ``AUTO_NOTIFY_THRESHOLD``:
+
+..code:: shell
+
+    # Set threshold to 20seconds
+    export AUTO_NOTIFY_THRESHOLD=20
+
+
+*Ignored Commands*
+
+A number of commands do not get notifications for long running times due to their nature (e.g. ``watch`` or ``man``).
+The list of ignored commands is specified in the ``AUTO_NOTIFY_IGNORE`` environment variable. This can be modified
+or completely overwritten based on your use case.
+
+..code:: shell
+
+    # Add docker to list of ignored commands
+    AUTO_NOTIFY_NOTIFY+=("docker")
+
+Make sure that you append to the array above *after* your plugin manager has been loaded in your ``zshrc``.
+
+If you wish to completely redefine what is ignored and not ignored, then just set ``AUTO_NOTIFY_IGNORE`` to
+a new array.
+
+..code:: shell
+
+    # redefine what is ignored by auto-notify
+    export AUTO_NOTIFY_IGNORE=("docker" "man" "sleep")
+
 Temporarily Disabling Notifications
 -----------------------------------