Index: sources/gui/qml/components/IconButton.qml
===================================================================
diff -u -rca05e940ea4a0c567acb05c4c8777dea079b0f08 -r29331d6ae2d7af814a0f4a7a37390877a54f516d
--- sources/gui/qml/components/IconButton.qml	(.../IconButton.qml)	(revision ca05e940ea4a0c567acb05c4c8777dea079b0f08)
+++ sources/gui/qml/components/IconButton.qml	(.../IconButton.qml)	(revision 29331d6ae2d7af814a0f4a7a37390877a54f516d)
@@ -30,6 +30,14 @@
     radius      : height
     border.color: "transparent"
 
+    signal hold()
+
+    onPressed   : _repeatTimer.start()
+    onReleased  : _repeatTimer.stop()
+    onCanceled  : _repeatTimer.stop()
+
+    onActiveFocusChanged: if ( ! activeFocus ) _repeatTimer.stop()
+
     Image { id  : _iconImage
         anchors.centerIn: parent
         height  : iconSize
@@ -39,4 +47,20 @@
         smooth: true
         mipmap: true
     }
+
+    Timer { id: _repeatTimer
+        interval    : 200
+        repeat      : true
+
+        onTriggered: {
+            hold()
+            interval = Math.max(50, interval - 10) // accelerate
+        }
+
+        onRunningChanged: {
+            if ( ! running )
+                interval = 200 // reset when released
+        }
+    }
+
 }
Index: sources/gui/qml/components/TouchRect.qml
===================================================================
diff -u -rcb9c48c7c307690dcafcfd16ef412fe660291692 -r29331d6ae2d7af814a0f4a7a37390877a54f516d
--- sources/gui/qml/components/TouchRect.qml	(.../TouchRect.qml)	(revision cb9c48c7c307690dcafcfd16ef412fe660291692)
+++ sources/gui/qml/components/TouchRect.qml	(.../TouchRect.qml)	(revision 29331d6ae2d7af814a0f4a7a37390877a54f516d)
@@ -114,6 +114,7 @@
     signal released
     signal clicked
     signal pressAndHold
+    signal canceled
 
     width   : Variables.touchRectWidth
     height  : Variables.touchRectHeight
@@ -139,5 +140,7 @@
         onPressed       : { if ( ! _private.pressDebouncing                    ) { onMouseEventLog("Pressed       ") ; _private.pressed = true ;  _root.pressed     (); pressDebounceTimer.start(); }   }
         onReleased      : { if (                              _private.pressed ) { onMouseEventLog("Released      ") ; _private.pressed = false;  _root.released    (); pressDebounceTimer.start(); }   }
         onPressAndHold  : {                                                        onMouseEventLog("PressAndHold  ") ;                            _root.pressAndHold();                                 }
+        onCanceled      : {                                                        onMouseEventLog("Canceled      ") ;                            _root.canceled()    ;                                 }
+
     }
 }
Index: sources/gui/qml/compounds/ValueAdjuster.qml
===================================================================
diff -u -r56817942c7534dc34c2b0bce640534fa51671086 -r29331d6ae2d7af814a0f4a7a37390877a54f516d
--- sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 56817942c7534dc34c2b0bce640534fa51671086)
+++ sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 29331d6ae2d7af814a0f4a7a37390877a54f516d)
@@ -47,6 +47,18 @@
 
     function clear()        { didActiveChange(false)        }
 
+    function decrease() {
+        if ( ! isActive ) { didActiveChange(true); return }
+
+        didChange(_rangedValue.decrementedValue())
+    }
+
+    function increase() {
+        if ( ! isActive ) { didActiveChange(true); return }
+
+        didChange(_rangedValue.incrementedValue())
+    }
+
     RangedValue { id: _rangedValue
         objectName: "_rangedValue"
     }
@@ -167,11 +179,8 @@
         visible                 : _root.editable
         iconImageSource         : enabled ? "qrc:/images/iArrowLeft" :
                                             "qrc:/images/iArrowLeftDisabled"
-        onClicked               : {
-            if ( ! isActive ) { didActiveChange(true); return }
-
-            didChange(_rangedValue.decrementedValue())
-        }
+        onClicked               : decrease()
+        onHold                  : decrease()
     }
 
     IconButton { id: _rightArrow
@@ -185,10 +194,7 @@
         visible                 : _root.editable
         iconImageSource         : enabled ? "qrc:/images/iArrowRight" :
                                             "qrc:/images/iArrowRightDisabled"
-        onClicked               : {
-            if ( ! isActive ) { didActiveChange(true); return }
-
-            didChange(_rangedValue.incrementedValue())
-        }
+        onClicked               : increase()
+        onHold                  : increase()
     }
 }