Feature request: add an option to hide header/title bar in NbAgg/WebAgg

This is a cross-post of https://github.com/matplotlib/matplotlib/issues/11986 as requested in that issue - this issue also applies if I use jupyter-matplotlib

I am making use of the NbAgg backend to implement data viewers for the Glue application in Jupyter notebook. However, one thing that I've found is that the title/header bar is unnecessary in a lot of (my use) cases and there is also a lot of wasted space between the title/header bar and the plot itself:

This is even more the case when opening multiple plots in a single notebook.

Would it be possible have a way to turn off the header/title bar and get a tighter layout? (or is there already a way to do this?). In my mind it would look nicer to simply have:

And for my use case I'm fine with losing access to the 'power' button to freeze the plot.

Commencez par retracer les points d’entrée NbAgg/WebAgg utilisés par jupyter-matplotlib et comparez la barre d’en-tête/de titre actuelle avec la mise en page compacte demandée. C’est terminé lorsqu’une option permet de désactiver cette barre tout en conservant le comportement actuel du graphique, et que la mise en page obtenue a été vérifiée dans un notebook.