Context
A really quick question as I'm trying to set up a map for showing GIS capabilities to beginners using uMap.
If I personalize the zoom level by increasing the highest value from 20 (which is the default maximum initial value) to 24, the map background is no more displayed when I actually zoom beyond 20 (the map background simply becomes gray):
Question
Is there something I can do to display the map background while zooming to closer zoom levels (greater than 20)?