I've just realised another another regression in the change from TinyMCE to Atto. Links.
On some Moodles where I had no plugin support I'd manually add a link from a thumbnail to a video to open in a new window etc etc, all well and good. Well, at least passable.
The code looked like this, generated by the coices in TinyMCE:
Now, all this functionality is lost in the link options in Atto.
Is there something I am missing? Is this a feature or a bug?