[OpenRoads 10.10] Graphics Group in OpenRoads

Hello everybody,
any tips how to delete all annotation elements in one graphics group in OpenRoads? It seems graphics group is not working as well as I know it in MicroStation.
We need to delete all annotation elements, which come from one Annotation Group, but it is not possible.
Example: I annotate my centerline by Annotation group included in Feature Definition (for example stationing of horizontal controls points). Then I use Element Annotation command for annotation of stationing of regular points. Then I need to delete some of previous annotations, but all elements, not only one text element of them. How to do? Delete command doesn't work.
I think the graphics group is answer (because all annotated elements are in one graphics group), but Delete command doesn't work for these annotation group elements.

Regards

Josef

OpenRoads 10.10