Added example image to the auditor documentation

doc/administration/auditor_users.md

@@ -2,13 +2,13 @@
 
 >**Note:** [Introduced][998] in GitLab 8.17.
 
-With Gitlab Enterprise Edition Premium, you can create *auditor* users, who 
-are given read-only access to all projects, groups, and other resources on the 
+With Gitlab Enterprise Edition Premium, you can create *auditor* users, who
+are given read-only access to all projects, groups, and other resources on the
 GitLab instance.
 
 First and foremost, an auditor user can perform all the actions that a regular user can.
 In projects that the auditor user owns, or has been added to, they can be added to
-groups, mentioned in comments, or have issues assigned to them. The one exception is 
+groups, mentioned in comments, or have issues assigned to them. The one exception is
 that auditor users cannot _create_ projects or groups.
 
 In addition, the auditor will be granted read-only access to all other projects/groups/etc.
@@ -17,4 +17,8 @@ on the GitLab instance.
 The `auditor` role is _not_ a read-only version of the `admin` role. The auditor will not be
 able to access the project settings pages, or the Admin Area.
 
+A user access level can be set to ‘Auditor’ in the Admin Area
+
+![Admin Area Form](auditor_access_form.png)
+
 [998]: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/998