Garmin GTN 625 Pilot's Manual page 108

To designate a waypoint altitude for use with vertical guidance:
Foreword
Getting
Started
Audio &
Xpdr Ctrl
The altitude color changes to cyan, indicating it is usable for vertical guidance.
To enter or modify an altitude constraint:
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
To delete an altitude constraint:
Weather
Nearest
Services/
Music
To return a modified altitude constraint to its original database value:
Utilities
System
Messages
Symbols
Appendix
Index
4-30
1. Select a waypoint altitude constraint.
2. Touch Save.
1. Select an altitude constraint.
2. Touch Type and select the constraint type.
3. Select the altitude data key. Enter an altitude constraint value
using the keypad. Touching Flight Level enters the value as
a flight level.
4. Touch Enter to accept the altitude.
5. Touch Save.
1. Select an altitude constraint.
2. Touch Remove Constraint.
3. Confirm the request by selecting OK.
1. Select an altitude constraint containing the pencil icon.
2. Touch Revert Constraint.
3. Confirm the request by selecting OK.
GTN 625/635/650 Pilot's Guide 190-01004-03 Rev. P