Index: src/QuickEditor/QuickEditor.h
===================================================================
--- src/QuickEditor/QuickEditor.h
+++ src/QuickEditor/QuickEditor.h
@@ -55,13 +55,15 @@
 
     void acceptSelection();
     void keyPressEvent(QKeyEvent* event) override;
+    void keyReleaseEvent(QKeyEvent* event) override;
     void mousePressEvent(QMouseEvent* event) override;
     void mouseMoveEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
     void mouseDoubleClickEvent(QMouseEvent* event) override;
     void paintEvent(QPaintEvent*) override;
     void drawBottomHelpText(QPainter& painter);
     void drawDragHandles(QPainter& painter);
+    void drawMagnifier(QPainter& painter);
     void drawMidHelpText(QPainter& painter);
     void drawSelectionSizeTooltip(QPainter& painter);
     void layoutBottomHelpText();
@@ -82,8 +84,13 @@
     static const int bottomHelpBoxPairSpacing;
     static const int bottomHelpBoxLineHeight;
 
+    static const int magZoom;
+    static const int magPixels;
+    static const int magOffset;
+
     QColor mMaskColour;
     QColor mStrokeColour;
+    QColor mCrossColour;
     QColor mLabelBackgroundColour;
     QColor mLabelForegroundColour;
     QRectF mSelection;
@@ -100,6 +107,10 @@
     MouseState mMouseDragState;
     QPixmap mPixmap;
     qreal dprI;
+    QPointF mMousePos;
+    bool mMagnifierAllowed;
+    bool mShowMagnifier;
+    bool mToggleMagnifier;
 
 signals:
     void grabDone(const QPixmap &pixmap);
Index: src/QuickEditor/QuickEditor.cpp
===================================================================
--- src/QuickEditor/QuickEditor.cpp
+++ src/QuickEditor/QuickEditor.cpp
@@ -35,9 +35,14 @@
 const int QuickEditor::bottomHelpBoxPairSpacing = 6;
 const int QuickEditor::bottomHelpBoxLineHeight = 24;
 
+const int QuickEditor::magZoom = 5;
+const int QuickEditor::magPixels = 16;
+const int QuickEditor::magOffset = 32;
+
 QuickEditor::QuickEditor(const QPixmap& pixmap, QObject* parent) :
     mMaskColour(QColor::fromRgbF(0, 0, 0, 0.15)),
     mStrokeColour(palette().highlight().color()),
+    mCrossColour(QColor::fromRgbF(mStrokeColour.redF(), mStrokeColour.greenF(), mStrokeColour.blueF(), 0.7)),
     mLabelBackgroundColour(QColor::fromRgbF(
         palette().light().color().redF(),
         palette().light().color().greenF(),
@@ -56,7 +61,10 @@
     mBottomHelpTextFont(font()),
     mBottomHelpGridLeftWidth(0),
     mMouseDragState(MouseState::None),
-    mPixmap(pixmap)
+    mPixmap(pixmap),
+    mMagnifierAllowed(false),
+    mShowMagnifier(SpectacleConfig::instance()->showMagnifierChecked()),
+    mToggleMagnifier(false)
 {
     Q_UNUSED(parent);
 
@@ -131,19 +139,36 @@
     default:
         break;
     }
+    if (event->modifiers() & Qt::ShiftModifier) {
+        mToggleMagnifier = true;
+        update();
+    }
+    event->accept();
+}
+
+void QuickEditor::keyReleaseEvent(QKeyEvent* event)
+{
+    if (mToggleMagnifier && !(event->modifiers() & Qt::ShiftModifier)) {
+        mToggleMagnifier = false;
+        update();
+    }
+    event->accept();
 }
 
 void QuickEditor::mousePressEvent(QMouseEvent* event)
 {
     if (event->button() & Qt::LeftButton) {
         const QPointF& pos = event->screenPos();
+        mMousePos = pos;
+        mMagnifierAllowed = true;
         mMouseDragState = whereIsTheMouse(pos);
         switch(mMouseDragState) {
         case MouseState::Outside:
             mStartPos = pos;
             break;
         case MouseState::Inside:
             mStartPos = pos;
+            mMagnifierAllowed = false;
             mInitialTopLeft = mSelection.topLeft();
             setCursor(Qt::ClosedHandCursor);
             break;
@@ -166,15 +191,21 @@
             break;
         }
     }
+    if (mMagnifierAllowed) {
+        update();
+    }
     event->accept();
 }
 
 void QuickEditor::mouseMoveEvent(QMouseEvent* event)
 {
     const QPointF& pos = event->screenPos();
+    mMousePos = pos;
+    mMagnifierAllowed = true;
     switch (mMouseDragState) {
     case MouseState::None: {
         setMouseCursor(pos);
+        mMagnifierAllowed = false;
         break;
     }
     case MouseState::TopLeft:
@@ -214,6 +245,7 @@
         break;
     }
     case MouseState::Inside: {
+        mMagnifierAllowed = false;
         // We use some math here to figure out if the diff with which we
         // move the rectangle with moves it out of bounds,
         // in which case we adjust the diff to not let that happen
@@ -309,6 +341,8 @@
                 drawDragHandles(painter);
             }
 
+        } else if (mMagnifierAllowed && (mShowMagnifier ^ mToggleMagnifier)) {
+            drawMagnifier(painter);
         }
         drawBottomHelpText(painter);
     } else {
@@ -417,6 +451,59 @@
     painter.fillPath(path, mStrokeColour);
 }
 
+void QuickEditor::drawMagnifier(QPainter &painter)
+{
+    const int pixels = 2 * magPixels + 1;
+    int magX = mMousePos.x() * devicePixelRatioF() - magPixels;
+    int offsetX = 0;
+    if (magX < 0) {
+        offsetX = magX;
+        magX = 0;
+    } else {
+        const int maxX = mPixmap.width() - pixels;
+        if (magX > maxX) {
+            offsetX = magX - maxX;
+            magX = maxX;
+        }
+    }
+    int magY = mMousePos.y() * devicePixelRatioF() - magPixels;
+    int offsetY = 0;
+    if (magY < 0) {
+        offsetY = magY;
+        magY = 0;
+    } else {
+        const int maxY = mPixmap.height() - pixels;
+        if (magY > maxY) {
+            offsetY = magY - maxY;
+            magY = maxY;
+        }
+    }
+    QRectF magniRect(magX, magY, pixels, pixels);
+
+    qreal drawPosX = mMousePos.x() + magOffset + pixels * magZoom / 2;
+    if (drawPosX > width() - pixels * magZoom / 2) {
+        drawPosX = mMousePos.x() - magOffset - pixels * magZoom / 2;
+    }
+    qreal drawPosY = mMousePos.y() + magOffset + pixels * magZoom / 2;
+    if (drawPosY > height() - pixels * magZoom / 2) {
+        drawPosY = mMousePos.y() - magOffset - pixels * magZoom / 2;
+    }
+    QPointF drawPos(drawPosX, drawPosY);
+    QRectF crossHairTop(drawPos.x() + magZoom * (offsetX - 0.5), drawPos.y() - magZoom * (magPixels + 0.5), magZoom, magZoom * (magPixels + offsetY));
+    QRectF crossHairRight(drawPos.x() + magZoom * (0.5 + offsetX), drawPos.y() + magZoom * (offsetY - 0.5), magZoom * (magPixels - offsetX), magZoom);
+    QRectF crossHairBottom(drawPos.x() + magZoom * (offsetX - 0.5), drawPos.y() + magZoom * (0.5 + offsetY), magZoom, magZoom * (magPixels - offsetY));
+    QRectF crossHairLeft(drawPos.x() - magZoom * (magPixels + 0.5), drawPos.y() + magZoom * (offsetY - 0.5), magZoom * (magPixels + offsetX), magZoom);
+    QRectF crossHairBorder(drawPos.x() - magZoom * (magPixels + 0.5) - 1, drawPos.y() - magZoom * (magPixels + 0.5) - 1, pixels * magZoom + 2, pixels * magZoom + 2);
+    const auto frag = QPainter::PixmapFragment::create(drawPos, magniRect, magZoom, magZoom);
+
+    painter.fillRect(crossHairBorder, mLabelForegroundColour);
+    painter.drawPixmapFragments(&frag, 1, mPixmap, QPainter::OpaqueHint);
+    painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
+    for (auto& rect : { crossHairTop, crossHairRight, crossHairBottom, crossHairLeft }) {
+        painter.fillRect(rect, mCrossColour);
+    }
+}
+
 void QuickEditor::drawMidHelpText(QPainter &painter)
 {
     painter.fillRect(geometry(), mMaskColour);