One issue, I ran into, though, is that when you set “Show labels” to “never”, it will get reset once you open the tooltip config the next time.
And I think - as you mentioned yesterday - as long as there is only one structure column in the tooltip, we should hide the label for the structure and shift the structure left:
Also, I wonder if we could render the structure image like 30% smaller. It would still be readable but make the tooltip quite a bit smaller.
The last thing, I think you could still squeeze out a bit space by reducing the line height. There is quite some space between the lines of text: