For some reason, I cannot find the "what is here" information on the PC version.
It does show the airspace "stack", however the individual items are not clickable.
In fact, as soon as you move the mouse, the "stack" disappears until the mouse is at standstill again.
Thus you cannot investigate airspace boundaries, like you can do on the iPad or on an Android device.
Example:
How do you display the boundaries of "Paris CTR" by selecting it from the following stack?