About the Intersections and airspaces, the manual said:
Intersections and fixes
Intersections can be displayed selectively. If the button Int is on, all intersections will be shown. If
the button Int is off and the button Vic is on, then victor airways and only the intersections on these
airways are shown. Similarly, if the button Int is off and the button Jet on, then jet airways and only
the intersections on these airways are visible.
If a flight plan involves GPS fixes, these will also be displayed irrespective of whether or not the
button Fix is on.
Note that we make a terminological distinction between intersections and GPS fixes. Intersections
are waypoints on an airway, while GPS fixes are merely geographic locations defined in terms of
latitude and longitude without having anything to do with airways.
I hope it helps
