Description of problem: Once I'm zoomed in on the map, it's not visually clear how to zoom out. Attached is a suggested mockup - overlay a zoom-out button when the map is in the zoomed-in state.
Created attachment 138920 [details] mockup showing a zoom-out overlay
system-config-date-1.8.90 which is building now doesn't use "regions" anymore but a magnification scale.