diff --git a/CocoaSplit.xcodeproj/project.xcworkspace/xcuserdata/zakk.xcuserdatad/UserInterfaceState.xcuserstate b/CocoaSplit.xcodeproj/project.xcworkspace/xcuserdata/zakk.xcuserdatad/UserInterfaceState.xcuserstate
index 51b5d417..3fe482a7 100644
Binary files a/CocoaSplit.xcodeproj/project.xcworkspace/xcuserdata/zakk.xcuserdatad/UserInterfaceState.xcuserstate and b/CocoaSplit.xcodeproj/project.xcworkspace/xcuserdata/zakk.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/CocoaSplit/InputSource.h b/CocoaSplit/InputSource.h
index 4f3b2ce7..b0ad94ff 100644
--- a/CocoaSplit/InputSource.h
+++ b/CocoaSplit/InputSource.h
@@ -245,6 +245,9 @@ typedef enum resize_style_t {
 -(void)autoCenter:(NSRect)containerRect;
 -(void)autoSize;
 -(void)layerUpdated;
+-(void)resetAspectRatio;
+
+
 
 
 
diff --git a/CocoaSplit/InputSource.m b/CocoaSplit/InputSource.m
index 7301609a..2eafbc0e 100644
--- a/CocoaSplit/InputSource.m
+++ b/CocoaSplit/InputSource.m
@@ -1938,6 +1938,33 @@ -(void) directSize:(CGFloat)width height:(CGFloat)height
 }
 
 
+-(void)resetAspectRatio
+{
+    
+
+    if (!self.videoInput || NSEqualSizes(NSZeroSize, self.videoInput.captureSize))
+    {
+        return;
+    }
+    
+    CGFloat height = self.height;
+    CGFloat width = self.width;
+    
+    CGFloat inputAR = self.videoInput.captureSize.width / self.videoInput.captureSize.height;
+    if (height > width)
+    {
+        width = inputAR * height;
+    } else {
+        height = width/inputAR;
+    }
+
+    resize_style resizeSave = self.resizeType;
+    self.resizeType = kResizeTop | kResizeRight | kResizeFree;
+    [self updateSize:width height:height];
+    self.resizeType = resizeSave;
+}
+
+
 -(void) updateSize:(CGFloat)width height:(CGFloat)height
 {
     
@@ -1962,7 +1989,6 @@ -(void) updateSize:(CGFloat)width height:(CGFloat)height
             height = width/inputAR;
             delta_h = height - oldLayout.size.height;
         }
-
     }
     
     if (self.layer)
diff --git a/CocoaSplit/PreviewView.m b/CocoaSplit/PreviewView.m
index 045c6a7f..419786f4 100644
--- a/CocoaSplit/PreviewView.m
+++ b/CocoaSplit/PreviewView.m
@@ -283,10 +283,15 @@ -(void) buildSettingsMenu
     } else {
         tmp = [self.sourceSettingsMenu insertItemWithTitle:@"Attach to underlying input" action:@selector(subLayerInputSource:) keyEquivalent:@"" atIndex:idx++];
     }
+    
+    tmp.target = self;
+    
+    tmp = [self.sourceSettingsMenu insertItemWithTitle:@"Reset to source AR" action:@selector(resetSourceAR:) keyEquivalent:@"" atIndex:idx++];
     tmp.target = self;
 }
 
 
+
 -(void)doLayoutMidi:(id)sender
 {
     if (self.sourceLayout)
@@ -1167,6 +1172,34 @@ -(void)setSourceAsTimer:(id)sender
 }
 
 
+
+-(void)resetSourceAR:(id)sender
+{
+    InputSource *toReset = nil;
+    
+    if (sender)
+    {
+        if ([sender isKindOfClass:[NSMenuItem class]])
+        {
+            NSMenuItem *item = (NSMenuItem *)sender;
+            toReset = (InputSource *)item.representedObject;
+        } else if ([sender isKindOfClass:[InputSource class]]) {
+            toReset = (InputSource *)sender;
+        }
+    }
+    
+    if (!toReset)
+    {
+        toReset = self.selectedSource;
+    }
+    
+    if (toReset)
+    {
+        [((InputSource *)toReset) resetAspectRatio];
+    }
+}
+
+
 -(void)detachSource:(id)sender
 {
     InputSource *toDetach = nil;