You can customize your region in the "Region parameters" dialog ("Parameters..." in the context menu). The number of settlements is affected by two tags - "civilized" and "barren".
Thanks a lot! I am playing with it and I find very useful a mini-guide which explains all the keywords you can enable within "Parameters": I would be happy to write it however I'd need your support! If you're intetested in it, can we catch up somewhere for a short conversation? Either email or telegram or anything esle... Thanks!
EDIT: there was a problem with my browser settings! Now the feature works, so pls do not consider anymore this post, sorry and thanks!
That would be fine, the real point is that shift+click (as suggested within the parameter window) doesn't work and I am not able to see any explanation. I use a Chrome browser with win10 (correctly updated). Pls let me know, thanks again