diff --git a/Ample/Base.lproj/LaunchWindow.xib b/Ample/Base.lproj/LaunchWindow.xib
index 8101654..64e20bb 100644
--- a/Ample/Base.lproj/LaunchWindow.xib
+++ b/Ample/Base.lproj/LaunchWindow.xib
@@ -115,7 +115,7 @@ DQ
                                         </textField>
                                         <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="ctE-fX-twN">
                                             <rect key="frame" x="318" y="92" width="51" height="16"/>
-                                            <autoresizingMask key="autoresizingMask"/>
+                                            <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                             <textFieldCell key="cell" lineBreakMode="clipping" title="Effects:" id="Sqk-7k-PxQ">
                                                 <font key="font" metaFont="system"/>
                                                 <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
@@ -162,6 +162,7 @@ DQ
                                                 <font key="font" metaFont="system"/>
                                             </buttonCell>
                                             <connections>
+                                                <binding destination="-2" name="enabled" keyPath="self.mameWindowMode" id="X80-2K-kTO"/>
                                                 <binding destination="-2" name="value" keyPath="self.mameSquarePixels" id="BiP-wC-Hpn"/>
                                             </connections>
                                         </button>
@@ -192,6 +193,17 @@ DQ
                                                 <binding destination="-2" name="selectedIndex" keyPath="self.mameWindowMode" id="B9e-SK-3RY"/>
                                             </connections>
                                         </popUpButton>
+                                        <button verticalHuggingPriority="750" id="9Db-wA-FP9">
+                                            <rect key="frame" x="15" y="29" width="115" height="18"/>
+                                            <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                                            <buttonCell key="cell" type="check" title="Capture Mouse" bezelStyle="regularSquare" imagePosition="left" state="on" inset="2" id="3xh-Q7-WFl">
+                                                <behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
+                                                <font key="font" metaFont="system"/>
+                                            </buttonCell>
+                                            <connections>
+                                                <binding destination="-2" name="value" keyPath="self.mameMouse" id="vWu-od-2d6"/>
+                                            </connections>
+                                        </button>
                                     </subviews>
                                 </view>
                             </tabViewItem>
diff --git a/Ample/LaunchWindowController.m b/Ample/LaunchWindowController.m
index 3834d21..d870143 100644
--- a/Ample/LaunchWindowController.m
+++ b/Ample/LaunchWindowController.m
@@ -31,11 +31,9 @@ static NSString *kContextMachine = @"kContextMachine";
 @property NSArray *args;
 
 @property NSString *mameMachine;
-@property BOOL mameWindow;
-@property BOOL mameNoThrottle;
 @property BOOL mameDebug;
 @property BOOL mameSquarePixels;
-@property BOOL mameNoBlur;
+@property BOOL mameMouse;
 
 @property BOOL mameAVI;
 @property BOOL mameWAV;
@@ -66,6 +64,7 @@ static NSString *kContextMachine = @"kContextMachine";
 -(void)windowWillLoad {
     [self setMameSpeed: 1];
     [self setMameBGFX: YES];
+    [self setMameMouse: NO];
 }
 
 - (void)windowDidLoad {
@@ -80,9 +79,10 @@ static NSString *kContextMachine = @"kContextMachine";
     
 
     NSArray *keys = @[
-        @"mameMachine", @"mameWindow", @"mameSquarePixels", @"mameNoBlur", @"mameWindowMode",
+        @"mameMachine", @"mameSquarePixels", @"mameWindowMode",
+        @"mameMouse",
         @"mameDebug",
-        @"mameSpeed", // @"mameNoThrottle",
+        @"mameSpeed",
         @"mameAVI", @"mameAVIPath",
         @"mameWAV", @"mameWAVPath",
         @"mameVGM", @"mameVGMPath",
@@ -236,11 +236,16 @@ static NSString * JoinArguments(NSArray *argv) {
 
     //[argv addObject: @"mame"];
     [argv addObject: _mameMachine];
+
+    // -confirm_quit?
+    [argv addObject: @"-skip_gameinfo"];
+
+    
+    if (_mameMouse)
+        [argv addObject: @"-mouse"]; // capture the mouse cursor when over the window.
     
     if (_mameDebug) [argv addObject: @"-debug"];
 
-    // -confirm_quit
-    [argv addObject: @"-skip_gameinfo"];
 
     
     /*
@@ -328,7 +333,6 @@ static NSString * JoinArguments(NSArray *argv) {
         [argv addObjectsFromArray: tmp];
     }
 
-    //if (_mameNoThrottle) [argv addObject: @"-nothrottle"];
     if (_mameSpeed < 0) {
         [argv addObject: @"-nothrottle"];
     } else if (_mameSpeed > 1) {