diff --git a/doc/usage/_static/pagure_roadmap2.png b/doc/usage/_static/pagure_roadmap2.png
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diff --git a/doc/usage/roadmap.rst b/doc/usage/roadmap.rst
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--- a/doc/usage/roadmap.rst
+++ b/doc/usage/roadmap.rst
@@ -6,6 +6,30 @@ their tags.
 
 The principal is as follow:
 
-* All the ticket with the tag ``roadmap`` will show up on the roadmap page
+* All the ticket with the tag ``roadmap`` will show up on the roadmap page.
 * For each milestones defined in the settings of the project, the roadmap
 will group tickets with the corresponding tag.
+* Tickets with the tag ``roadmap`` that are not associated with any of the
+milestones defined in the settings are group in an ``unplanned`` section.
+
+
+Example
+-------
+
+For a project named ``test`` on ``pagure.io``.
+
+
+
+* First, go to the settings page of the project, create the milestones you
+like, for example: ``v1.0`` and ``v2.0``.
+
+* For the tickets you want to be on these milestones, go through each of them
+and add them the tags: ``roadmap`` in combination with the milestone you want
+``v1.0`` or ``v2.0``, or none of them if the ticket is on the roadmap but
+not assigned to any milestones.
+
+
+* And this is how it will look like
+
+.. image:: _static/pagure_roadmap2.png
+        :target: _static/pagure_roadmap2.png