When working with RUTA Workbenchit sometimes happens that one of the annotation types is selected and can't be deselected anymore.
Event when deselecting the annotation, the annotated text is highlighted. You can see an example of this behavior on the attached Screenshots.
Sometimes it helps deleting all Output Documents and restarting eclipse but sometimes it's needed to reinstall Workbench and recreate the project. (Maybe there is a better way which I don't know).