diff --git a/applet/contents/ui/ConfigGeneral.qml b/applet/contents/ui/ConfigGeneral.qml
--- a/applet/contents/ui/ConfigGeneral.qml
+++ b/applet/contents/ui/ConfigGeneral.qml
@@ -45,6 +45,7 @@
         from: 10
         to: 150
         stepSize: 1
+        editable: true
         textFromValue: function(value) {
             return value + "%";
         }
@@ -59,6 +60,7 @@
         from: 1
         to: 100
         stepSize: 1
+        editable: true
         textFromValue: function(value) {
             return value + "%";
         }