i just found a prior post about similar topic: categories for multi-photos. and dave's answer that it would be too much work. however photo's ARE being tagged already thru embedded 'plant tags'.
i noticed in multi-photo page on top a box with 'often tagged plants' - but i never new that i can click on the names to extract only THAT group!
so only those groups listed on top can be viewed separately?
here's the original post about the topic:
The thread "multi-plant categories" in
Site Talk forum
