I am just trying out the Free Trial of SD.

Here in southern Germany I am unable to see the standard Airspace C starting at FL100.
I can see C starting at FL130 in the alpine area, but not the standard C in the flatlands.

Same goes with airspace E. Visible when the lower limit is off-standard (like 1000ft)
but not when standard (2500 ft).

What am I doing wrong? Thanks a lot!

(and yes, I have well planned a route high enough - currently FL150)

There is already a switch for this. It's called the dynamic airspace feature, or "hide features above", and hopefully you already use it. If you regularly fly at FL100 then you will have changed this option appropriately, and therefore airspace you have said you're interested in will be displayed.

We will not be changing the What's Here menu to display stuff that isn't actually displayed on the map. It would often result in the list of stuff being many, many items longer than it currently is (we couldn't just stop at airspace; we'd need to include other aeronautical stuff the user had turned off like IFR waypoints, glider airfields, etc).

I've managed to make some small optimisations in the way we hit-test large pieces of airspace and will be publishing an updated Germany chart containing the class C in the next few days, so you'll be able to see it then. An update to the client software such that the airspace appears in the What's Here menu (assuming you have airspace that high turned on) will need to wait until the next release, obviously.

It's ok to list only features in the"whar's here" menu which the user didn't filter out himself. Therefore there shouldn't be that many more items to list.

Again, I consider it quite problematic if I can't get complete information about airspaces present at a particular point.

-- Chris.