diff --git a/commands/imagelib/effects/kpEffectBlurSharpenCommand.cpp b/commands/imagelib/effects/kpEffectBlurSharpenCommand.cpp
--- a/commands/imagelib/effects/kpEffectBlurSharpenCommand.cpp
+++ b/commands/imagelib/effects/kpEffectBlurSharpenCommand.cpp
@@ -55,7 +55,7 @@
     switch (type) {
     case kpEffectBlurSharpen::Blur: return i18n ("Soften");
     case kpEffectBlurSharpen::Sharpen: return i18n ("Sharpen");
-    default: return QString();
+    default: return {};
     }
 }
 
diff --git a/commands/imagelib/effects/kpEffectReduceColorsCommand.cpp b/commands/imagelib/effects/kpEffectReduceColorsCommand.cpp
--- a/commands/imagelib/effects/kpEffectReduceColorsCommand.cpp
+++ b/commands/imagelib/effects/kpEffectReduceColorsCommand.cpp
@@ -61,7 +61,7 @@
         }
         return i18n ("Reduce to 256 Color");
 
-    default: return QString();
+    default: return {};
     }
 }
 
diff --git a/commands/imagelib/transforms/kpTransformFlipCommand.cpp b/commands/imagelib/transforms/kpTransformFlipCommand.cpp
--- a/commands/imagelib/transforms/kpTransformFlipCommand.cpp
+++ b/commands/imagelib/transforms/kpTransformFlipCommand.cpp
@@ -74,7 +74,7 @@
     else
     {
         qCCritical(kpLogCommands) << "kpTransformFlipCommand::name() not asked to flip";
-        return QString();
+        return {};
     }
 #endif
 
diff --git a/commands/imagelib/transforms/kpTransformResizeScaleCommand.cpp b/commands/imagelib/transforms/kpTransformResizeScaleCommand.cpp
--- a/commands/imagelib/transforms/kpTransformResizeScaleCommand.cpp
+++ b/commands/imagelib/transforms/kpTransformResizeScaleCommand.cpp
@@ -125,7 +125,7 @@
         }
     }
 
-    return QString ();
+    return {};
 }
 
 // public virtual [base kpCommand]
diff --git a/document/kpDocumentSaveOptions.cpp b/document/kpDocumentSaveOptions.cpp
--- a/document/kpDocumentSaveOptions.cpp
+++ b/document/kpDocumentSaveOptions.cpp
@@ -166,7 +166,7 @@
 // public static
 QString kpDocumentSaveOptions::invalidMimeType ()
 {
-    return QString();
+    return {};
 }
 
 //---------------------------------------------------------------------
diff --git a/document/kpDocument_Open.cpp b/document/kpDocument_Open.cpp
--- a/document/kpDocument_Open.cpp
+++ b/document/kpDocument_Open.cpp
@@ -107,7 +107,7 @@
                                       kpUrlFormatter::PrettyFilename (url)));
         }
 
-        return QImage ();
+        return {};
     }
 
     QMimeDatabase db;
@@ -137,7 +137,7 @@
                             i18n ("Could not open \"%1\" - unsupported image format.\n"
                                   "The file may be corrupt.",
                                   kpUrlFormatter::PrettyFilename (url)));
-        return QImage ();
+        return {};
     }
 
 #if DEBUG_KP_DOCUMENT
diff --git a/imagelib/transforms/kpTransformCrop_ImageSelection.cpp b/imagelib/transforms/kpTransformCrop_ImageSelection.cpp
--- a/imagelib/transforms/kpTransformCrop_ImageSelection.cpp
+++ b/imagelib/transforms/kpTransformCrop_ImageSelection.cpp
@@ -54,7 +54,7 @@
     ~SetDocumentToSelectionImageCommand () override;
 
     /* (uninteresting child of macro cmd) */
-    QString name () const override { return QString(); }
+    QString name () const override { return {}; }
 
     kpCommandSize::SizeType size () const override
     {
diff --git a/lgpl/generic/kpColorCollection.cpp b/lgpl/generic/kpColorCollection.cpp
--- a/lgpl/generic/kpColorCollection.cpp
+++ b/lgpl/generic/kpColorCollection.cpp
@@ -474,7 +474,7 @@
 kpColorCollection::color(int index) const
 {
     if ((index < 0) || (index >= count()))
-	return QColor();
+    return {};
 
     return d->colorList[index].color;
 }
@@ -494,7 +494,7 @@
 kpColorCollection::name(int index) const
 {
   if ((index < 0) || (index >= count()))
-	return QString();
+      return {};
 
   return d->colorList[index].name;
 }
diff --git a/mainWindow/kpMainWindow_File.cpp b/mainWindow/kpMainWindow_File.cpp
--- a/mainWindow/kpMainWindow_File.cpp
+++ b/mainWindow/kpMainWindow_File.cpp
@@ -474,7 +474,7 @@
     return fd.selectedUrls();
   }
 
-  return QList<QUrl>();
+  return {};
 }
 
 //---------------------------------------------------------------------
@@ -831,7 +831,7 @@
     if (mimeTypes.isEmpty ())
     {
         qCCritical(kpLogMainWindow) << "No output mimetypes!";
-        return QUrl ();
+        return {};
     }
 
 #define MIME_TYPE_IS_VALID() (!fdSaveOptions.mimeTypeIsInvalid () &&                 \
@@ -958,7 +958,7 @@
         return fd.selectedUrl ();
     }
 
-    return QUrl ();
+    return {};
 #undef SETUP_READ_CFG
 }
 
diff --git a/tools/selection/kpAbstractSelectionTool.cpp b/tools/selection/kpAbstractSelectionTool.cpp
--- a/tools/selection/kpAbstractSelectionTool.cpp
+++ b/tools/selection/kpAbstractSelectionTool.cpp
@@ -618,7 +618,7 @@
     {
     case None:
         // NOP.
-        return QVariant ();
+        return {};
 
     case Create:
         return operationCreate (op, data1, data2);
@@ -631,7 +631,7 @@
 
     default:
         Q_ASSERT (!"Unhandled draw type");
-        return QVariant ();
+        return {};
     }
 }
 
diff --git a/tools/selection/kpAbstractSelectionTool_Create.cpp b/tools/selection/kpAbstractSelectionTool_Create.cpp
--- a/tools/selection/kpAbstractSelectionTool_Create.cpp
+++ b/tools/selection/kpAbstractSelectionTool_Create.cpp
@@ -296,5 +296,5 @@
     }
 
 
-    return QVariant ();
+    return {};
 }
diff --git a/tools/selection/kpAbstractSelectionTool_Move.cpp b/tools/selection/kpAbstractSelectionTool_Move.cpp
--- a/tools/selection/kpAbstractSelectionTool_Move.cpp
+++ b/tools/selection/kpAbstractSelectionTool_Move.cpp
@@ -401,7 +401,7 @@
         break;
     }
 
-    return QVariant ();
+    return {};
 }
 
 //---------------------------------------------------------------------
diff --git a/tools/selection/kpAbstractSelectionTool_ResizeScale.cpp b/tools/selection/kpAbstractSelectionTool_ResizeScale.cpp
--- a/tools/selection/kpAbstractSelectionTool_ResizeScale.cpp
+++ b/tools/selection/kpAbstractSelectionTool_ResizeScale.cpp
@@ -444,7 +444,7 @@
     }
 
 
-    return QVariant ();
+    return {};
 }
 
 //---------------------------------------------------------------------
diff --git a/tools/selection/text/kpToolText_SelectText.cpp b/tools/selection/text/kpToolText_SelectText.cpp
--- a/tools/selection/text/kpToolText_SelectText.cpp
+++ b/tools/selection/text/kpToolText_SelectText.cpp
@@ -133,5 +133,5 @@
     }
 
 
-    return QVariant ();
+    return {};
 }
diff --git a/views/kpView_Selections.cpp b/views/kpView_Selections.cpp
--- a/views/kpView_Selections.cpp
+++ b/views/kpView_Selections.cpp
@@ -161,7 +161,7 @@
 {
     const int atomicLength = selectionResizeHandleAtomicSize ();
     if (atomicLength <= 0) {
-        return QRegion ();
+        return {};
     }
 
 
diff --git a/widgets/imagelib/effects/kpEffectBlurSharpenWidget.cpp b/widgets/imagelib/effects/kpEffectBlurSharpenWidget.cpp
--- a/widgets/imagelib/effects/kpEffectBlurSharpenWidget.cpp
+++ b/widgets/imagelib/effects/kpEffectBlurSharpenWidget.cpp
@@ -114,7 +114,7 @@
 // public virtual [base kpEffectWidgetBase]
 QString kpEffectBlurSharpenWidget::caption () const
 {
-    return QString();
+    return {};
 }
 
 
diff --git a/widgets/imagelib/effects/kpEffectEmbossWidget.cpp b/widgets/imagelib/effects/kpEffectEmbossWidget.cpp
--- a/widgets/imagelib/effects/kpEffectEmbossWidget.cpp
+++ b/widgets/imagelib/effects/kpEffectEmbossWidget.cpp
@@ -67,7 +67,7 @@
 // public virtual [base kpEffectWidgetBase]
 QString kpEffectEmbossWidget::caption () const
 {
-    return QString();
+    return {};
 }
 
 
diff --git a/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp b/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp
--- a/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp
+++ b/widgets/imagelib/effects/kpEffectToneEnhanceWidget.cpp
@@ -90,7 +90,7 @@
 QString kpEffectToneEnhanceWidget::caption () const
 {
     // TODO: Why doesn't this have a caption?  Ditto for the other effects.
-    return QString();
+    return {};
 }
 
 
diff --git a/widgets/imagelib/effects/kpEffectWidgetBase.cpp b/widgets/imagelib/effects/kpEffectWidgetBase.cpp
--- a/widgets/imagelib/effects/kpEffectWidgetBase.cpp
+++ b/widgets/imagelib/effects/kpEffectWidgetBase.cpp
@@ -42,7 +42,7 @@
 // public
 QString kpEffectWidgetBase::caption () const
 {
-    return QString();
+    return {};
 }
 
 
diff --git a/widgets/toolbars/options/kpToolWidgetBase.cpp b/widgets/toolbars/options/kpToolWidgetBase.cpp
--- a/widgets/toolbars/options/kpToolWidgetBase.cpp
+++ b/widgets/toolbars/options/kpToolWidgetBase.cpp
@@ -135,7 +135,7 @@
 QList <int> kpToolWidgetBase::spreadOutElements (const QList <int> &sizes, int max)
 {
     if (sizes.count () == 0) {
-        return QList <int> ();
+        return {};
     }
 
     if (sizes.count () == 1)
diff --git a/widgets/toolbars/options/kpToolWidgetFillStyle.cpp b/widgets/toolbars/options/kpToolWidgetFillStyle.cpp
--- a/widgets/toolbars/options/kpToolWidgetFillStyle.cpp
+++ b/widgets/toolbars/options/kpToolWidgetFillStyle.cpp
@@ -124,7 +124,7 @@
         return i18n ("Fill with Foreground Color");
 
     default:
-        return QString();
+        return {};
     }
 }