How to re-dock a Title Panel
I was having trouble with a Title, in that when I closed the Title panel, it didn't save my changes (no Save button?). This seemed to cure itself when I restated Premiere Pro
But while messing around with some settings, I inadvertently un-docked one of the Title panels, I've watched various tutorials and tried everything to get it re-docked, but nothing seems to be working. It doesn't 'snap' back anyway when I move it around, and there are no menu options I can see to re-dock it.

