diff --git a/src/QuickEditor/QuickEditor.h b/src/QuickEditor/QuickEditor.h
--- a/src/QuickEditor/QuickEditor.h
+++ b/src/QuickEditor/QuickEditor.h
@@ -25,6 +25,8 @@
 #include <QPainter>
 #include <QStaticText>
 #include <QWidget>
+#include <QScreen>
+#include <QGuiApplication>
 #include <utility>
 #include <vector>
 
@@ -122,6 +124,7 @@
     bool mMagnifierAllowed;
     bool mShowMagnifier;
     bool mToggleMagnifier;
+    QRect mPrimaryScreenGeo;
 
 Q_SIGNALS:
     void grabDone(const QPixmap &pixmap);
diff --git a/src/QuickEditor/QuickEditor.cpp b/src/QuickEditor/QuickEditor.cpp
--- a/src/QuickEditor/QuickEditor.cpp
+++ b/src/QuickEditor/QuickEditor.cpp
@@ -77,7 +77,8 @@
     mPixmap(pixmap),
     mMagnifierAllowed(false),
     mShowMagnifier(SpectacleConfig::instance()->showMagnifierChecked()),
-    mToggleMagnifier(false)
+    mToggleMagnifier(false),
+    mPrimaryScreenGeo(QGuiApplication::primaryScreen()->geometry())
 {
     SpectacleConfig *config = SpectacleConfig::instance();
     if (config->useLightRegionMaskColour()) {
@@ -491,7 +492,7 @@
         contentWidth = qMax(contentWidth, mBottomHelpGridLeftWidth + maxRightWidth + bottomHelpBoxPairSpacing);
         contentHeight += (++i != bottomHelpLength ? bottomHelpBoxMarginBottom : 0);
     }
-    mBottomHelpContentPos.setX((width() - contentWidth) / 2);
+    mBottomHelpContentPos.setX((mPrimaryScreenGeo.width() - contentWidth) / 2 + mPrimaryScreenGeo.x());
     mBottomHelpContentPos.setY(height() - contentHeight - 8);
     mBottomHelpGridLeftWidth += mBottomHelpContentPos.x();
     mBottomHelpBorderBox.setRect(
@@ -653,7 +654,7 @@
     painter.fillRect(geometry(), mMaskColor);
     painter.setFont(mMidHelpTextFont);
     QRect textSize = painter.boundingRect(QRect(), Qt::AlignCenter, mMidHelpText);
-    QPoint pos((width() - textSize.width()) / 2, (height() - textSize.height()) / 2);
+    QPoint pos((mPrimaryScreenGeo.width() - textSize.width()) / 2 + mPrimaryScreenGeo.x(), (height() - textSize.height()) / 2);
 
     painter.setBrush(mLabelBackgroundColor);
     QPen pen(mLabelForegroundColor);