diff --git a/MahApps.Metro/Controls/Flyout.cs b/MahApps.Metro/Controls/Flyout.cs
index 2f28b85970..464d4afd35 100644
--- a/MahApps.Metro/Controls/Flyout.cs
+++ b/MahApps.Metro/Controls/Flyout.cs
@@ -23,12 +23,13 @@ public class Flyout : ContentControl
         
         public static readonly DependencyProperty HeaderProperty = DependencyProperty.Register("Header", typeof(string), typeof(Flyout), new PropertyMetadata(default(string)));
         public static readonly DependencyProperty PositionProperty = DependencyProperty.Register("Position", typeof(Position), typeof(Flyout), new PropertyMetadata(Position.Left, PositionChanged));
-        public static readonly DependencyProperty IsPinnableProperty = DependencyProperty.Register("IsPinnable", typeof(bool), typeof(Flyout), new PropertyMetadata(default(bool)));
+        public static readonly DependencyProperty IsPinnedProperty = DependencyProperty.Register("IsPinned", typeof(bool), typeof(Flyout), new PropertyMetadata(true));
         public static readonly DependencyProperty IsOpenProperty = DependencyProperty.Register("IsOpen", typeof(bool), typeof(Flyout), new FrameworkPropertyMetadata(default(bool), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, IsOpenedChanged));
         public static readonly DependencyProperty IsModalProperty = DependencyProperty.Register("IsModal", typeof(bool), typeof(Flyout));
         public static readonly DependencyProperty HeaderTemplateProperty = DependencyProperty.Register("HeaderTemplate", typeof(DataTemplate), typeof(Flyout));
         public static readonly DependencyProperty CloseCommandProperty = DependencyProperty.RegisterAttached("CloseCommand", typeof(ICommand), typeof(Flyout), new UIPropertyMetadata(null));
         public static readonly DependencyProperty ThemeProperty = DependencyProperty.Register("Theme", typeof(FlyoutTheme), typeof(Flyout), new FrameworkPropertyMetadata(FlyoutTheme.Dark, ThemeChanged));
+        public static readonly DependencyProperty ExternalCloseButtonProperty = DependencyProperty.Register("ExternalCloseButton", typeof(MouseButton), typeof(Flyout), new PropertyMetadata(MouseButton.Left));
 
         /// <summary>
         /// Gets the actual theme (dark/light) of this flyout.
@@ -64,12 +65,21 @@ public bool IsOpen
         }
 
         /// <summary>
-        /// Gets/sets whether this flyout is pinnable.
+        /// Gets/sets whether this flyout stays open when the user clicks outside of it.
         /// </summary>
-        public bool IsPinnable
+        public bool IsPinned
         {
-            get { return (bool)GetValue(IsPinnableProperty); }
-            set { SetValue(IsPinnableProperty, value); }
+            get { return (bool)GetValue(IsPinnedProperty); }
+            set { SetValue(IsPinnedProperty, value); }
+        }
+        
+        /// <summary>
+        /// Gets/sets the mouse button that closes the flyout on an external mouse click.
+        /// </summary>
+        public MouseButton ExternalCloseButton
+        {
+            get { return (MouseButton) GetValue(ExternalCloseButtonProperty); }
+            set { SetValue(ExternalCloseButtonProperty, value); }
         }
 
         /// <summary>
diff --git a/MahApps.Metro/Controls/FlyoutsControl.cs b/MahApps.Metro/Controls/FlyoutsControl.cs
index 9c5bf781dd..864c410614 100644
--- a/MahApps.Metro/Controls/FlyoutsControl.cs
+++ b/MahApps.Metro/Controls/FlyoutsControl.cs
@@ -6,6 +6,7 @@
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Input;
 
 namespace MahApps.Metro.Controls
 {
@@ -16,6 +17,27 @@ namespace MahApps.Metro.Controls
     [StyleTypedProperty(Property = "ItemContainerStyle", StyleTargetType = typeof(Flyout))]
     public class FlyoutsControl : ItemsControl
     {
+        public static readonly DependencyProperty OverrideExternalCloseButtonProperty = DependencyProperty.Register("OverrideExternalCloseButton", typeof(MouseButton?), typeof(FlyoutsControl), new PropertyMetadata(null));
+        public static readonly DependencyProperty OverrideIsPinnedProperty = DependencyProperty.Register("OverrideIsPinned", typeof(bool), typeof(FlyoutsControl), new PropertyMetadata(false));
+        
+        /// <summary>
+        /// Gets/sets whether <see cref="MahApps.Metro.Controls.Flyout.ExternalCloseButton"/> is ignored and all flyouts behave as if it was set to the value of this property.
+        /// </summary>
+        public MouseButton? OverrideExternalCloseButton
+        {
+            get { return (MouseButton?) GetValue(OverrideExternalCloseButtonProperty); }
+            set { SetValue(OverrideExternalCloseButtonProperty, value); }
+        }
+        
+        /// <summary>
+        /// Gets/sets whether <see cref="MahApps.Metro.Controls.Flyout.IsPinned"/> is ignored and all flyouts behave as if it was set false.
+        /// </summary>
+        public bool OverrideIsPinned
+        {
+            get { return (bool) GetValue(OverrideIsPinnedProperty); }
+            set { SetValue(OverrideIsPinnedProperty, value); }
+        }
+        
         static FlyoutsControl()
         {
             DefaultStyleKeyProperty.OverrideMetadata(
@@ -139,4 +161,4 @@ private void ReorderZIndices(Flyout lastChanged)
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/MahApps.Metro/Controls/MetroWindow.cs b/MahApps.Metro/Controls/MetroWindow.cs
index f30ea6d8f5..24b244e057 100644
--- a/MahApps.Metro/Controls/MetroWindow.cs
+++ b/MahApps.Metro/Controls/MetroWindow.cs
@@ -405,6 +405,30 @@ private void ThemeManagerOnIsThemeChanged(object sender, OnThemeChangedEventArgs
                 this.HandleWindowCommandsForFlyouts(flyouts);
             }
         }
+        
+        private void FlyoutsPreviewKeyDown(object sender, MouseButtonEventArgs e)
+        {
+            if (Flyouts.OverrideExternalCloseButton == null)
+            {
+                foreach (Flyout flyout in Flyouts.Items)
+                {
+                    if (flyout.ExternalCloseButton == e.ChangedButton && (flyout.IsPinned == false || Flyouts.OverrideIsPinned == true))
+                    {
+                        flyout.IsOpen = false;
+                    }
+                }
+            }
+            else if (Flyouts.OverrideExternalCloseButton == e.ChangedButton)
+            {
+                foreach (Flyout flyout in Flyouts.Items)
+                {
+                    if (flyout.IsPinned == false || Flyouts.OverrideIsPinned == true)
+                    {
+                        flyout.IsOpen = false;
+                    }
+                }
+            }
+        }
 
         static MetroWindow()
         {
@@ -429,6 +453,8 @@ public override void OnApplyTemplate()
             overlayBox = GetTemplateChild(PART_OverlayBox) as Grid;
             metroDialogContainer = GetTemplateChild(PART_MetroDialogContainer) as Grid;
             flyoutModal = GetTemplateChild(PART_FlyoutModal) as Rectangle;
+            flyoutModal.PreviewMouseDown += FlyoutsPreviewKeyDown;
+            this.PreviewMouseDown += FlyoutsPreviewKeyDown;
 
             titleBar = GetTemplateChild(PART_TitleBar) as UIElement;
 
@@ -593,4 +619,4 @@ internal FlyoutStatusChangedRoutedEventArgs(RoutedEvent rEvent, object source):
             public Flyout ChangedFlyout { get; internal set; }
         }
     }
-}
\ No newline at end of file
+}