Index: sources/gui/qml/components/SliderArrows.qml
===================================================================
diff -u -rc52701259341870bc9a436fc87f84f23b340c09c -r7f984daf450d01b14495eca7c47c96d936f8b32b
--- sources/gui/qml/components/SliderArrows.qml	(.../SliderArrows.qml)	(revision c52701259341870bc9a436fc87f84f23b340c09c)
+++ sources/gui/qml/components/SliderArrows.qml	(.../SliderArrows.qml)	(revision 7f984daf450d01b14495eca7c47c96d936f8b32b)
@@ -49,12 +49,11 @@
         }
 
         onPressed: decrementValue()
-//// commented out for future
-//            onPressAndHold: {
-//                _sliderAdjustValueTimer.isIncrementing = false
-//                _sliderAdjustValueTimer.restart()
-//            }
-//            onReleased: _sliderAdjustValueTimer.stop()
+        onPressAndHold: {
+            _sliderAdjustValueTimer.isIncrementing = false
+            _sliderAdjustValueTimer.restart()
+        }
+        onReleased: _sliderAdjustValueTimer.stop()
     }
 
     TouchRect { id: _incrementValueButton
@@ -72,32 +71,25 @@
         }
 
         onPressed: incrementValue()
-//// commented out for future
-//            onPressAndHold: {
-//                _sliderAdjustValueTimer.isIncrementing = true
-//                _sliderAdjustValueTimer.restart()
-//            }
-//            onReleased: _sliderAdjustValueTimer.stop()
+        onPressAndHold: {
+            _sliderAdjustValueTimer.isIncrementing = true
+            _sliderAdjustValueTimer.restart()
+        }
+        onReleased: _sliderAdjustValueTimer.stop()
     }
 
-//// commented out for future
-//    Timer { id: _sliderAdjustValueTimer
-//        property bool isIncrementing : true
-//        interval: 250 //ms
-//        running : false
-//        repeat  : true
-//        onTriggered: {
-//            if(isIncrementing)
-//                incrementValue()
-//            else
-//                decrementValue()
+    Timer { id: _sliderAdjustValueTimer
+        property bool isIncrementing : true
+        interval: Variables.sliderAdjustPressAndHoldRefreshRate //ms
+        running : false
+        repeat  : true
+        onTriggered: {
+            if(isIncrementing)
+                incrementValue()
+            else
+                decrementValue()
 
-//            // for optimizing purposes, stop timer when max or min value reached
-//            if ((_root.value == maximum) || (_root.value == minimum)) {
-//                _sliderAdjustValueTimer.stop()
-//            }
-
-//            //DEBUG console.log("timer triggered " + _root.value)
-//        }
-//    }
+            //DEBUG console.log("timer triggered " + _root.value)
+        }
+    }
 }