Banners are used to display concise messages about the service itself: what the user should know about OSRD at this particular moment to be as efficient as possible. New features availability, upcoming maintenance, or connectivity issues are good examples.
-They should not be used to display user interactions feedback, such as form validation.
+Displayed at the very top of the viewport, above any other content, banners are used to convey concise messages about the service itself: what the user should know about OSRD at this particular moment to be as efficient as possible. New features availability, upcoming maintenance, or connectivity issues are good examples.
+They should not be used to display user interactions feedback, such as form validation. They are not sticky on scroll and can or cannot be dismissed.
Banners are a straightforward use of the colours, icons, and text styles previously described here.