diff --git a/qmlUiKirigami/ImageViewer.qml b/qmlUiKirigami/ImageViewer.qml
--- a/qmlUiKirigami/ImageViewer.qml
+++ b/qmlUiKirigami/ImageViewer.qml
@@ -24,6 +24,7 @@
 import QtQuick 2.7
 import QtQuick.Window 2.2
 import QtQuick.Controls 2.0 as Controls
+import QtQuick.Layouts 1.3
 import org.kde.kirigami 2.0 as Kirigami
 import org.kde.koko 0.1 as Koko
 import org.kde.kquickcontrolsaddons 2.0 as KQA
@@ -48,6 +49,7 @@
     Koko.ImageDocument {
         id: imageDoc
         path: listView.currentItem.currentImageSource
+        onResetHandle: brightnessSlider.value = 0.5
     }
     
     Kirigami.ContextDrawer {
@@ -95,6 +97,55 @@
         ]
     }
 
+    ColumnLayout {
+        anchors.top: root.top
+        width: root.width
+        z: listView.z + 1
+        
+        Controls.Slider {
+            id: brightnessSlider
+            property real previousValue: 0.5
+            Layout.fillWidth: true
+            visible: applicationWindow().controlsVisible
+            from: 0
+            to: 1.0
+            value: 0.5
+            stepSize: 0.1
+            z: listView.z + 1
+            snapMode: Controls.Slider.SnapAlways
+            hoverEnabled: true
+            Controls.ToolTip {
+                parent: brightnessSlider
+                visible: brightnessSlider.hovered
+                text: i18n("Brightness Controller")
+            }
+            onValueChanged: {
+                if( value > previousValue) {
+                    imageDoc.changeBrightness( true)
+                } else if( value < previousValue) {
+                    imageDoc.changeBrightness( false)
+                } 
+                previousValue = value
+                listView.forceActiveFocus()
+            }
+        }
+        
+        RowLayout {
+            Layout.fillWidth: true
+            visible: imageDoc.edited
+            Controls.Button {
+                Layout.fillWidth: true
+                text: i18n("Save")
+                onClicked: imageDoc.save()
+            }
+            Controls.Button {
+                Layout.fillWidth: true
+                text: i18n("Cancel")
+                onClicked: imageDoc.cancel()
+            }
+        }
+    }
+    
     //FIXME: HACK
     property bool wasDrawerOpen
     Component.onCompleted: {
@@ -260,6 +311,7 @@
                     MouseArea {
                         anchors.fill: parent
                         onClicked: {
+                            contextDrawer.drawerOpen = false
                             doubleClickTimer.restart();
                         }
                         onDoubleClicked: {
diff --git a/src/imagedocument.h b/src/imagedocument.h
--- a/src/imagedocument.h
+++ b/src/imagedocument.h
@@ -27,6 +27,7 @@
     Q_OBJECT
     Q_PROPERTY(QString path READ path WRITE setPath NOTIFY pathChanged)
     Q_PROPERTY(QImage visualImage READ visualImage NOTIFY visualImageChanged)
+    Q_PROPERTY(bool edited READ edited NOTIFY editedChanged)
 public:
     ImageDocument();
     ~ImageDocument();
@@ -36,15 +37,24 @@
     
     QImage visualImage();
     
+    bool edited();
+    
     Q_INVOKABLE void rotate( int angle);
+    Q_INVOKABLE void changeBrightness( bool isIncrease);
+    Q_INVOKABLE void save();
+    Q_INVOKABLE void cancel();
     
 signals:
     void pathChanged(const QString &url);
     void visualImageChanged();
+    void editedChanged();
+    void resetHandle();
     
 private:
     QString m_path;
     QImage *m_image;
+    QImage m_originalImage;
+    bool m_edited;
 };
 
 #endif
diff --git a/src/imagedocument.cpp b/src/imagedocument.cpp
--- a/src/imagedocument.cpp
+++ b/src/imagedocument.cpp
@@ -26,10 +26,14 @@
 {
     m_image = new QImage();
     connect( this, &ImageDocument::pathChanged, 
-             this, [this] (const QString &url) { 
+             this, [this] (const QString &url) {
+                 emit resetHandle();
                  /** Since the url passed by the model in the ImageViewer.qml contains 'file://' prefix */
                  QString location = QUrl( url).path();
                  m_image->load( location);
+                 m_originalImage = *m_image;
+                 m_edited = false;
+                 emit editedChanged();
                  emit visualImageChanged();
             });
 }
@@ -55,6 +59,11 @@
     return *m_image;
 }
 
+bool ImageDocument::edited()
+{
+    return m_edited;
+}
+
 void ImageDocument::rotate(int angle)
 {
     QMatrix matrix;
@@ -64,7 +73,48 @@
     if (QFileInfo( location).isWritable()) {
         m_image->save( location);
     }
-    
+    emit visualImageChanged();
+}
+
+void ImageDocument::changeBrightness( bool isIncrease)
+{
+    if( isIncrease) {
+        for( int i = 0; i < m_image->rect().width() ; i++ ) 
+        {
+            for( int j = 0; j < m_image->rect().height(); j++ )
+            {
+                m_image->setPixelColor(i, j , m_image->pixelColor( i , j).lighter( 120));
+            }
+        }
+    } else {
+        for( int i = 0; i < m_image->rect().width() ; i++ ) 
+        {
+            for( int j = 0; j < m_image->rect().height(); j++ )
+            {
+                m_image->setPixelColor(i, j , m_image->pixelColor( i , j).darker( 120));
+            }
+        }
+    }
+    m_edited = true;
+    emit editedChanged();
+    emit visualImageChanged();
+}
+
+void ImageDocument::save()
+{
+    QString location = QUrl( m_path).path();
+    if( QFileInfo( location).isWritable()) {
+        m_image->save( location);
+        m_edited = false;
+        emit editedChanged();
+    }
+}
+
+void ImageDocument::cancel()
+{
+    m_image = &m_originalImage;
+    m_edited = false;
+    emit editedChanged();
     emit visualImageChanged();
 }