Index: sources/gui/qml/components/RangeBar.qml
===================================================================
diff -u -race4047d1007962c136fa32d0531102e22073f32 -r9a0581274e4dc51af6d6f3e4dd932581e8dce445
--- sources/gui/qml/components/RangeBar.qml	(.../RangeBar.qml)	(revision ace4047d1007962c136fa32d0531102e22073f32)
+++ sources/gui/qml/components/RangeBar.qml	(.../RangeBar.qml)	(revision 9a0581274e4dc51af6d6f3e4dd932581e8dce445)
@@ -33,14 +33,16 @@
     property alias  rangebar    : _rangeRect
 
     property int    markerHeight: Variables.rangeMarkerHeightMidle
-    property color  markerColor : Colors.rangeMarker
+    property color  markerColor : markerOutRangeNotify ? (value > lowerBound && value < upperBound ? Colors.rangeMarker : Colors.red) : Colors.rangeMarker
+    property bool   markerOutRangeNotify: false
 
     property bool   markerVisible       : true
     property int    markerBoundHeight   : Variables.rangeMarkerHeightShort
     property color  markerBoundColor    : Colors.rangeMarkerShort
+    property int    markerFontSize      : Fonts.fontPixelRangeMarker
 
-    property bool   minTextHorizontalCenter: true
-    property bool   maxTextHorizontalCenter: true
+    property bool   lowerTextHorizontalCenter: true
+    property bool   upperTextHorizontalCenter: true
 
     RangeRect { id: _rangeRect
         color:  "red"
@@ -55,9 +57,10 @@
 
         minText.visible: true
         maxText.visible: true
-        minText.anchors.leftMargin  : minTextHorizontalCenter ? -minText.width / 2 : 0
-        maxText.anchors.rightMargin : maxTextHorizontalCenter ? -maxText.width / 2 : 0
 
+        minText.anchors.leftMargin  : lowerTextHorizontalCenter ? -minText.width / 2 : 0
+        maxText.anchors.rightMargin : upperTextHorizontalCenter ? -maxText.width / 2 : 0
+
         RangeMarker { id: _rangeMarkerLowerBound
             decimal : _root.decimal
             text.visible: false
@@ -73,6 +76,7 @@
             color   : markerBoundColor
             anchors.left: parent.right
         }
+        onClicked: _root.clicked(vMouseEvent)
     }
 
     RangeMarker { id: _rangeMarkerValue
@@ -81,6 +85,7 @@
         value   : parent.value
         x       : ((parent.width * (parent.value - minimum)) / (maximum - minimum))
         text.visible: true
+        text.font.pixelSize: _root.markerFontSize
         hasHandle   : true
         height  : markerHeight
         color   : markerColor