diff --git a/src/MissionManager/SimpleMissionItem.cc b/src/MissionManager/SimpleMissionItem.cc
index 2131661ef1f9b05d79908194f06bbd70f80af610..e24f2a0957757b62ea119b663a8afb01cb42efd9 100644
--- a/src/MissionManager/SimpleMissionItem.cc
+++ b/src/MissionManager/SimpleMissionItem.cc
@@ -706,13 +706,16 @@ void SimpleMissionItem::_terrainAltChanged(void)
     }
 
     if (qIsNaN(terrainAltitude())) {
+        qDebug() << "1";
         // Set NaNs to signal we are waiting on terrain data
         _missionItem._param7Fact.setRawValue(qQNaN());
         _amslAltAboveTerrainFact.setRawValue(qQNaN());
     } else {
         double newAboveTerrain = terrainAltitude() + _altitudeFact.rawValue().toDouble();
         double oldAboveTerrain = _amslAltAboveTerrainFact.rawValue().toDouble();
+        qDebug() << "2" << newAboveTerrain << oldAboveTerrain;
         if (qIsNaN(oldAboveTerrain) || !qFuzzyCompare(newAboveTerrain, oldAboveTerrain)) {
+            qDebug() << "3";
             _missionItem._param7Fact.setRawValue(newAboveTerrain);
             _amslAltAboveTerrainFact.setRawValue(newAboveTerrain);
         }
diff --git a/src/PlanView/SimpleItemEditor.qml b/src/PlanView/SimpleItemEditor.qml
index 71e65a2d1c760ecf30a672cebad1845d1df484f3..84c9d27e389d984b677a06766d5b863e5795c2bd 100644
--- a/src/PlanView/SimpleItemEditor.qml
+++ b/src/PlanView/SimpleItemEditor.qml
@@ -29,7 +29,10 @@ Rectangle {
 
     ExclusiveGroup {
         id: altRadios
-        onCurrentChanged: missionItem.altitudeMode = current.altModeValue
+        onCurrentChanged: {
+            altModeLabel.text = Qt.binding(function() { return current.helpText })
+            missionItem.altitudeMode = current.altModeValue
+        }
     }
 
     Column {
@@ -104,29 +107,36 @@ Rectangle {
                         text:           qsTr("Rel")
                         exclusiveGroup: altRadios
                         checked:        missionItem.altitudeMode === altModeValue
-                        readonly property int altModeValue: _altModeRelative
 
+                        readonly property int       altModeValue:   _altModeRelative
+                        readonly property string    helpText:       qsTr("Relative to home altitude")
 					}
                     QGCRadioButton {
                         text:           qsTr("Abs")
                         exclusiveGroup: altRadios
                         checked:        missionItem.altitudeMode === altModeValue
                         visible:        QGroundControl.corePlugin.options.showMissionAbsoluteAltitude || missionItem.altitudeMode === altModeValue
-                        readonly property int altModeValue: _altModeAbsolute
+
+                        readonly property int       altModeValue:   _altModeAbsolute
+                        readonly property string    helpText:       qsTr("Absolute WGS84")
                     }
                     QGCRadioButton {
                         text:           qsTr("AGL")
                         exclusiveGroup: altRadios
                         checked:        missionItem.altitudeMode === altModeValue
-                        readonly property int altModeValue: _altModeAboveTerrain
+
+                        readonly property int   altModeValue: _altModeAboveTerrain
+                        property string         helpText:     qsTr("Calculated from terrain data\nAbs Alt ") + missionItem.amslAltAboveTerrain.valueString + " " + missionItem.amslAltAboveTerrain.units
                     }
                     QGCRadioButton {
                         text:           qsTr("TerrF")
                         exclusiveGroup: altRadios
                         checked:        missionItem.altitudeMode === altModeValue
                         visible:        missionItem.supportsTerrainFrame || missionItem.altitudeMode === altModeValue
-                        readonly property int altModeValue: _altModeTerrainFrame
-                            }
+
+                        readonly property int       altModeValue:   _altModeTerrainFrame
+                        readonly property string    helpText:       qsTr("Using terrain reference frame")
+                    }
                 }
 
                 FactValueSlider {
@@ -135,23 +145,12 @@ Rectangle {
                     incrementSlots: 1
                 }
 
-                RowLayout {
-                    spacing: _margin
-                    visible: missionItem.altitudeMode === _altModeAboveTerrain
-
-                    QGCLabel {
-                        text:           qsTr("Calculated Abs Alt")
-                        font.pointSize: ScreenTools.smallFontPointSize
-                    }
-                    QGCLabel {
-                        text:       missionItem.amslAltAboveTerrain.valueString + " " + missionItem.amslAltAboveTerrain.units
-                    }
-                }
-
                 QGCLabel {
-                    text:           qsTr("Using terrain reference frame")
+                    id:             altModeLabel
+                    anchors.left:   parent.left
+                    anchors.right:  parent.right
+                    wrapMode:       Text.WordWrap
                     font.pointSize: ScreenTools.smallFontPointSize
-                    visible:        missionItem.altitudeMode === _altModeTerrainFrame
                 }
             }
         }