diff --git a/src/FactSystem/FactControls/FactTextField.qml b/src/FactSystem/FactControls/FactTextField.qml
index 71d795fb789b35fa69e09dbf9628dd2594437235..99c227d683e6d2928c1e31bbe1beef164ced96cc 100644
--- a/src/FactSystem/FactControls/FactTextField.qml
+++ b/src/FactSystem/FactControls/FactTextField.qml
@@ -36,7 +36,7 @@ QGCTextField {
                 fact.value = text
             } else {
                 _validateString = text
-                qgcView.showDialog(validationErrorDialogComponent, qsTr("Invalid Value"), qgcView.showDialogDefaultWidth, StandardButton.Save)
+                qgcView.showDialog(validationErrorDialogComponent, qsTr("Invalid Value"), qgcView.showDialogDefaultWidth, StandardButton.Save | StandardButton.Cancel)
             }
         } else {
             fact.value = text
diff --git a/src/QmlControls/ParameterEditorDialog.qml b/src/QmlControls/ParameterEditorDialog.qml
index 5ec4dbb79d42bf85394ff9714c28291af87f08ee..f3e76069eab49a17968b5fc691eebb728309e2a8 100644
--- a/src/QmlControls/ParameterEditorDialog.qml
+++ b/src/QmlControls/ParameterEditorDialog.qml
@@ -11,6 +11,7 @@ import QtQuick          2.3
 import QtQuick.Controls 1.2
 import QtQuick.Layouts  1.2
 
+import QGroundControl               1.0
 import QGroundControl.Controls      1.0
 import QGroundControl.Palette       1.0
 import QGroundControl.Controllers   1.0
@@ -28,6 +29,9 @@ QGCViewDialog {
 
     property real   _editFieldWidth:            ScreenTools.defaultFontPixelWidth * 20
     property bool   _longDescriptionAvailable:  fact.longDescription != ""
+    property bool   _editingParameter:          fact.componentId != 0
+    property bool   _allowForceSave:            QGroundControl.corePlugin.showAdvancedUI || !_editingParameter
+    property bool   _allowDefaultReset:         fact.defaultValueAvailable && (QGroundControl.corePlugin.showAdvancedUI || !_editingParameter)
 
     ParameterEditorController { id: controller; factPanel: parent }
 
@@ -49,11 +53,18 @@ QGCViewDialog {
                 hideDialog()
             } else {
                 validationError.text = errorString
-                forceSave.visible = true
+                if (_allowForceSave) {
+                    forceSave.visible = true
+                }
             }
         }
     }
 
+    function reject() {
+        fact.valueChanged(fact.value)
+        hideDialog();
+    }
+
     function bitmaskValue() {
         var value = 0;
         for (var i = 0; i < fact.bitmaskValues.length; ++i) {
@@ -68,7 +79,9 @@ QGCViewDialog {
     Component.onCompleted: {
         if (validate) {
             validationError.text = fact.validate(validateValue, false /* convertOnly */)
-            forceSave.visible = true
+            if (_allowForceSave) {
+                forceSave.visible = true
+            }
         }
     }
 
@@ -109,7 +122,7 @@ QGCViewDialog {
 
                 QGCButton {
                     anchors.baseline:   valueField.baseline
-                    visible:            fact.defaultValueAvailable
+                    visible:            _allowDefaultReset
                     text:               qsTr("Reset to default")
 
                     onClicked: {
@@ -195,7 +208,7 @@ QGCViewDialog {
 
                 QGCLabel {
                     text:       qsTr("Default: ") + fact.defaultValueString
-                    visible:    fact.defaultValueAvailable
+                    visible:    _allowDefaultReset
                 }
             }