Why can't I see airspace (B, C, D, SUA, etc) information when I press and hold on the map?

To view airspace information on the Maps page, touch-hold in the airspace, then make sure the "All" tab is selected in the pop-up. Airspace information is shown in grey in the pop-up.

Also, you will need to have a current airport database downloaded to your device.  To view airspace information, please open ForeFlight and go to MORE > DOWNLOADS and download the current Airport Database.