Display of the size of the preview zone ?

[Markorki]

I changed my screen for a very large one (1920*1080), and I now use layout 7, with a square preview on the right half (*), and the other half shared between 4 columns of thumbs (cursor set at 80) and the folders/categories/favorites . That's very comfortable to scan many pictures.

I would like to have an indication of the size of the preview zone, at least while I'm resizing it (floating tooltips ?), just like you have an indication of the size of a selection in an image.