Garmin GTN 625 Pilot's Manual page 216

To control the display of European airway airspaces:
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
8-26
1. While viewing the Map Setup Airspaces option, touch the
Other/ADIZ Range key and select a value.
2. Select Off for the Other/ADIZ Range to turn off the display of
airway airspaces.
Airway Airspaces - Off
Figure 8-30 Selecting the Display of European Airway Airspaces
GTN 625/635/650 Pilot's Guide
Airway Airspaces - On
Airway Airspaces - On
190-01004-03 Rev. P