diff --git a/lib/crop/croptool.cpp b/lib/crop/croptool.cpp
--- a/lib/crop/croptool.cpp
+++ b/lib/crop/croptool.cpp
@@ -290,11 +290,19 @@
 
 void CropTool::mousePressEvent(QGraphicsSceneMouseEvent* event)
 {
-    event->accept();
     if (event->buttons() != Qt::LeftButton) {
+        event->ignore();
+        return;
+    }
+    const CropHandle newMovingHandle = d->handleAt(event->pos());
+    if (event->modifiers() & Qt::ControlModifier
+        && !(newMovingHandle & (CH_Top | CH_Left | CH_Right | CH_Bottom))) {
+        event->ignore();
         return;
     }
-    d->mMovingHandle = d->handleAt(event->pos());
+
+    event->accept();
+    d->mMovingHandle = newMovingHandle;
     d->updateCursor(d->mMovingHandle, true /* down */);
 
     if (d->mMovingHandle == CH_Content) {
diff --git a/lib/redeyereduction/redeyereductiontool.cpp b/lib/redeyereduction/redeyereductiontool.cpp
--- a/lib/redeyereduction/redeyereductiontool.cpp
+++ b/lib/redeyereduction/redeyereductiontool.cpp
@@ -133,10 +133,12 @@
 
 void RedEyeReductionTool::mousePressEvent(QGraphicsSceneMouseEvent* event)
 {
-    event->accept();
-    if (event->buttons() != Qt::LeftButton) {
+    if (event->buttons() != Qt::LeftButton
+        || event->modifiers() & Qt::ControlModifier) {
+        event->ignore();
         return;
     }
+    event->accept();
     if (d->mStatus == NotSet) {
         d->mToolWidget->diameterSpinBox->setValue(d->mDiameter);
         d->mToolWidget->showMainPage();