as anyone been able to use the new media picker annotations as described in this 3 month old blog post?
I'm using the new editor, and I've uploaded an image. I do see some new buttons - instead of the old Size/Border/Properties buttons:

I see these new alignment buttons below the image and sizing bars to drag on the sides:

But I can't for the life of me see where there is any option to add annotations to my images.
Am I being really dense, or has this feature not been rolled out 100%?