diff --git a/src/config/extendedslider.cpp b/src/config/extendedslider.cpp
new file mode 100644
index 00000000..c6e9579c
--- /dev/null
+++ b/src/config/extendedslider.cpp
@@ -0,0 +1,50 @@
+// Copyright 2017 Alejandro Sirgo Rica
+//
+// This file is part of Flameshot.
+//
+//     Flameshot is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as published by
+//     the Free Software Foundation, either version 3 of the License, or
+//     (at your option) any later version.
+//
+//     Flameshot is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "extendedslider.h"
+
+ExtendedSlider::ExtendedSlider(QWidget *parent)
+    : QSlider(parent)
+{
+    connect(this, &ExtendedSlider::valueChanged,
+            this, &ExtendedSlider::updateTooltip);
+    connect(this, &ExtendedSlider::sliderMoved,
+            this, &ExtendedSlider::fireTimer);
+    m_timer.setSingleShot(true);
+    connect(&m_timer, &QTimer::timeout,
+            this, &ExtendedSlider::modificationsEnded);
+}
+
+int ExtendedSlider::mappedValue(int min, int max) {
+    qreal progress =
+            ((value() - minimum())) / static_cast<qreal>(maximum() - minimum());
+    return min + (max - min) * progress;
+}
+
+void ExtendedSlider::setMapedValue(int min, int val, int max) {
+    qreal progress = ((val - min) + 1) / static_cast<qreal>(max - min);
+    int value = minimum() + (maximum() - minimum()) * progress;
+    setValue(value);
+}
+
+void ExtendedSlider::updateTooltip() {
+    setToolTip(QString::number(value()));
+}
+
+void ExtendedSlider::fireTimer() {
+    m_timer.start(500);
+}
diff --git a/src/config/extendedslider.h b/src/config/extendedslider.h
new file mode 100644
index 00000000..c08b6ea8
--- /dev/null
+++ b/src/config/extendedslider.h
@@ -0,0 +1,45 @@
+// Copyright 2017 Alejandro Sirgo Rica
+//
+// This file is part of Flameshot.
+//
+//     Flameshot is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as published by
+//     the Free Software Foundation, either version 3 of the License, or
+//     (at your option) any later version.
+//
+//     Flameshot is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EXTENDEDSLIDER_H
+#define EXTENDEDSLIDER_H
+
+#include <QSlider>
+#include <QTimer>
+
+class ExtendedSlider : public QSlider
+{
+    Q_OBJECT
+public:
+    explicit ExtendedSlider(QWidget *parent = nullptr);
+
+    int mappedValue(int min, int max);
+    void setMapedValue(int min, int val, int max);
+
+signals:
+    void modificationsEnded();
+
+private slots:
+    void updateTooltip();
+    void fireTimer();
+
+private:
+    QTimer m_timer;
+
+};
+
+#endif // EXTENDEDSLIDER_H
diff --git a/src/config/visualseditor.cpp b/src/config/visualseditor.cpp
index 3a25c789..6ce2ef6d 100644
--- a/src/config/visualseditor.cpp
+++ b/src/config/visualseditor.cpp
@@ -1,8 +1,25 @@
+// Copyright 2017 Alejandro Sirgo Rica
+//
+// This file is part of Flameshot.
+//
+//     Flameshot is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as published by
+//     the Free Software Foundation, either version 3 of the License, or
+//     (at your option) any later version.
+//
+//     Flameshot is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
+
 #include "visualseditor.h"
 #include "src/config/buttonlistview.h"
 #include "src/config/uicoloreditor.h"
 #include "src/utils/confighandler.h"
-#include <QSlider>
+#include "src/config/extendedslider.h"
 #include <QLabel>
 #include <QVBoxLayout>
 #include <QHBoxLayout>
@@ -17,35 +34,37 @@ VisualsEditor::VisualsEditor(QWidget *parent) : QWidget(parent)
 void VisualsEditor::updateComponents() {
     m_buttonList->updateComponents();
     m_colorEditor->updateComponents();
-    m_opacity = ConfigHandler().contrastOpacityValue();
-    m_opacitySlider->setValue(m_opacity);
+    int opacity = ConfigHandler().contrastOpacityValue();
+    m_opacitySlider->setMapedValue(0, opacity, 255);
 }
 
 void VisualsEditor::initOpacitySlider() {
-    QLabel *label = new QLabel(tr("Opacity of area outside selection:"));
-    m_layout->addWidget(label);
-
-    m_opacitySlider = new QSlider(Qt::Horizontal);
-    m_opacitySlider->setRange(0, 255);
-    connect(m_opacitySlider, &QSlider::sliderMoved,
-            this, &VisualsEditor::updateOpacity);
-    connect(m_opacitySlider, &QSlider::sliderReleased,
+    m_opacitySlider = new ExtendedSlider();
+    m_opacitySlider->setOrientation(Qt::Horizontal);
+    m_opacitySlider->setRange(0, 100);
+    connect(m_opacitySlider, &ExtendedSlider::modificationsEnded,
             this, &VisualsEditor::saveOpacity);
     QHBoxLayout *localLayout = new QHBoxLayout();
     localLayout->addWidget(new QLabel("0%"));
     localLayout->addWidget(m_opacitySlider);
     localLayout->addWidget(new QLabel("100%"));
-    m_opacity = ConfigHandler().contrastOpacityValue();
-    m_opacitySlider->setValue(m_opacity);
-    m_layout->addLayout(localLayout);
-}
 
-void VisualsEditor::updateOpacity(int opacity) {
-    m_opacity = opacity;
+    QLabel *label = new QLabel();
+    QString labelMsg = tr("Opacity of area outside selection:") + " %1";
+    connect(m_opacitySlider, &ExtendedSlider::valueChanged,
+            this, [labelMsg, label](int val){
+        label->setText(labelMsg.arg(val));
+    });
+    m_layout->addWidget(label);
+    m_layout->addLayout(localLayout);
+
+    int opacity = ConfigHandler().contrastOpacityValue();
+    m_opacitySlider->setMapedValue(0, opacity, 255);
 }
 
 void VisualsEditor::saveOpacity() {
-    ConfigHandler().setContrastOpacity(m_opacity);
+    int value = m_opacitySlider->mappedValue(0, 255);
+    ConfigHandler().setContrastOpacity(value);
 }
 
 void VisualsEditor::initWidgets() {
@@ -66,4 +85,3 @@ void VisualsEditor::initWidgets() {
             m_buttonList, &ButtonListView::selectAll);
     listLayout->addWidget(setAllButtons);
 }
-
diff --git a/src/config/visualseditor.h b/src/config/visualseditor.h
index 05007bc2..6eaa9cf6 100644
--- a/src/config/visualseditor.h
+++ b/src/config/visualseditor.h
@@ -3,7 +3,7 @@
 
 #include <QWidget>
 
-class QSlider;
+class ExtendedSlider;
 class QVBoxLayout;
 class ButtonListView;
 class UIcolorEditor;
@@ -18,15 +18,13 @@ public slots:
     void updateComponents();
 
 private slots:
-    void updateOpacity(int);
     void saveOpacity();
 
 private:
-    int m_opacity; // Slider local value
     QVBoxLayout *m_layout;
     ButtonListView *m_buttonList;
     UIcolorEditor *m_colorEditor;
-    QSlider *m_opacitySlider;
+    ExtendedSlider *m_opacitySlider;
 
     void initWidgets();
     void initOpacitySlider();