diff -r ad9fe7dc2ff7 -r ebc33ffb1cbd QTfrontend/res/css/qt.css
--- a/QTfrontend/res/css/qt.css	Sat Nov 02 17:00:40 2019 +0100
+++ b/QTfrontend/res/css/qt.css	Mon Nov 04 03:08:59 2019 +0100
@@ -397,6 +397,12 @@
 height: 6px;
 border-radius: 3px;
 }
+QSlider::handle::horizontal:hover {
+background-color: yellow;
+}
+QSlider::handle::horizontal:pressed {
+background-color: white;
+}
 QSlider::handle::horizontal:disabled {
 background-color: #a0a0a0;
 }