With the latest daily build versions of ImageJ1 (Help > Update ImageJ > daily build), you will have now a new ROI Menu (if not visible click the >>).
In particular this Menu comes with functions related to the new ROI group attribute.
This group attribute allows to annotate ROI for different categories of objects.
See the pdf attached for a more detailed description of the functionalities.
Those functionalities are now part of ImageJ1 core via the Roi.class and RoiManager.class meaning they are also available for Fiji and any scripting language including the macro language (code-completion still to come).
RoiGroup.pdf (660.6 KB)