Hi Toufiq, thank you for your answer.
I know the Zoom option, but the map must be zoomed at level 5 to show entire France, as markers can be anywhere in France. But when i have 2 or more markers in the same city, i can see only 1 until I zoom "strong" on the city, you know ?
I saw some possibilities with "leaflet" and "Marker Clustering plugin", but I don't really know how to implement it in Page Builder OpenStreetMap...
If you can't give advices, maybe you can think about it for a next update release ? ;)
Thank you again.