I was flying over a quite complicated airspace with overlaping zones.
Before reaching a zone the border of the zone becomes clearly yellow on the map view and a warning is displayed.
When crusing it is easy to see on the enroute features wich areas one will enter on the present track.
It could be nice when clicking on an area on the enroute features view, that it would light up in yellow on the map so it would be clear how it extends. Especially this could be useful when different zones are stacked on top of each other.
A bit difficult to display but I hope you get the meaning.