diff --git a/mouse/mouse_c.h b/mouse/mouse_c.h
index f273fbd..d7d11b0 100644
--- a/mouse/mouse_c.h
+++ b/mouse/mouse_c.h
@@ -101,7 +101,7 @@ void moveMouse(MMPointInt32 point){
 		#define MOUSE_COORD_TO_ABS(coord, width_or_height) ( \
 			((65536 * coord) / width_or_height) + (coord < 0 ? -1 : 1))
 
-		MMRectInt32 rect = getScreenRect(-1);
+		MMRectInt32 rect = getScreenRect(1);
 		int32_t x = MOUSE_COORD_TO_ABS(point.x - rect.origin.x, rect.size.w);
 		int32_t y = MOUSE_COORD_TO_ABS(point.y - rect.origin.y, rect.size.h);
 
@@ -239,12 +239,8 @@ void scrollMouseXY(int x, int y) {
 		int xdir = 6;
 		Display *display = XGetMainDisplay();
 
-		if (y < 0) {
-			ydir = 5;
-		}
-		if (x < 0) {
-			xdir = 7;
-		}
+		if (y < 0) { ydir = 5; }
+		if (x < 0) { xdir = 7; }
 
 		int xi; int yi;
 		for (xi = 0; xi < abs(x); xi++) {
@@ -299,7 +295,7 @@ static double crude_hypot(double x, double y){
 
 bool smoothlyMoveMouse(MMPointInt32 endPoint, double lowSpeed, double highSpeed){
 	MMPointInt32 pos = location();
-	MMSizeInt32 screenSize = getMainDisplaySize();
+	// MMSizeInt32 screenSize = getMainDisplaySize();
 	double velo_x = 0.0, velo_y = 0.0;
 	double distance;
 
@@ -315,13 +311,13 @@ bool smoothlyMoveMouse(MMPointInt32 endPoint, double lowSpeed, double highSpeed)
 		velo_x /= veloDistance;
 		velo_y /= veloDistance;
 
-		pos.x += floor(velo_x + 0.5);
-		pos.y += floor(velo_y + 0.5);
+		pos.x += floor(velo_x + 0.8);
+		pos.y += floor(velo_y + 0.8);
 
 		/* Make sure we are in the screen boundaries! (Strange things will happen if we are not.) */
-		if (pos.x >= screenSize.w || pos.y >= screenSize.h) {
-			return false;
-		}
+		// if (pos.x >= screenSize.w || pos.y >= screenSize.h) {
+		// 	return false;
+		// }
 		moveMouse(pos);
 
 		/* Wait 1 - 3 milliseconds. */
diff --git a/robotgo.go b/robotgo.go
index 05d569d..cbd143d 100644
--- a/robotgo.go
+++ b/robotgo.go
@@ -75,6 +75,8 @@ var (
 
 	// NotPid used the hwnd not pid in windows
 	NotPid bool
+	// Scale option the os screen scale
+	Scale bool
 )
 
 type (
@@ -253,7 +255,7 @@ func SysScale(displayId ...int) float64 {
 	return float64(s)
 }
 
-// Scaled get the screen scaled size
+// Scaled get the screen scaled return scale size
 func Scaled(x int, displayId ...int) int {
 	f := ScaleF(displayId...)
 	return Scaled0(x, f)
@@ -282,7 +284,8 @@ func GetScreenRect(displayId ...int) Rect {
 		int(rect.size.w), int(rect.size.h)
 
 	if runtime.GOOS == "windows" {
-		f := ScaleF(displayId...)
+		// f := ScaleF(displayId...)
+		f := ScaleF()
 		x, y, w, h = Scaled0(x, f), Scaled0(y, f), Scaled0(w, f), Scaled0(h, f)
 	}
 	return Rect{
@@ -474,17 +477,24 @@ func CheckMouse(btn string) C.MMMouseButton {
 	return C.LEFT_BUTTON
 }
 
+// MoveScale calculate the os scale factor x, y
+func MoveScale(x, y int, displayId ...int) (int, int) {
+	if Scale && runtime.GOOS == "windows" {
+		f := ScaleF()
+		x, y = Scaled0(x, f), Scaled0(y, f)
+	}
+
+	return x, y
+}
+
 // Move move the mouse to (x, y)
 //
 // Examples:
 //
 //	robotgo.MouseSleep = 100  // 100 millisecond
 //	robotgo.Move(10, 10)
-func Move(x, y int) {
-	// if runtime.GOOS == "windows" {
-	// 	f := ScaleF()
-	// 	x, y = Scaled0(x, f), Scaled0(y, f)
-	// }
+func Move(x, y int, displayId ...int) {
+	x, y = MoveScale(x, y, displayId...)
 
 	cx := C.int32_t(x)
 	cy := C.int32_t(y)
@@ -498,6 +508,8 @@ func Move(x, y int) {
 // Drag drag the mouse to (x, y),
 // It's not valid now, use the DragSmooth()
 func Drag(x, y int, args ...string) {
+	x, y = MoveScale(x, y)
+
 	var button C.MMMouseButton = C.LEFT_BUTTON
 	cx := C.int32_t(x)
 	cy := C.int32_t(y)
@@ -516,6 +528,8 @@ func Drag(x, y int, args ...string) {
 //
 //	robotgo.DragSmooth(10, 10)
 func DragSmooth(x, y int, args ...interface{}) {
+	x, y = MoveScale(x, y)
+
 	Toggle("left")
 	MilliSleep(50)
 	MoveSmooth(x, y, args...)
@@ -536,6 +550,7 @@ func MoveSmooth(x, y int, args ...interface{}) bool {
 	// 	f := ScaleF()
 	// 	x, y = Scaled0(x, f), Scaled0(y, f)
 	// }
+	x, y = MoveScale(x, y)
 
 	cx := C.int32_t(x)
 	cy := C.int32_t(y)
diff --git a/robotgo_fn_v1.go b/robotgo_fn_v1.go
index 0132aef..89cacf9 100644
--- a/robotgo_fn_v1.go
+++ b/robotgo_fn_v1.go
@@ -57,8 +57,8 @@ func TypeStringDelayed(str string, delay int) {
 
 // Deprecated: use the ScaledF(),
 //
-// Scale get the screen scale (only windows old), drop
-func Scale() int {
+// Scale1 get the screen scale (only windows old), drop
+func Scale1() int {
 	dpi := map[int]int{
 		0: 100,
 		// DPI Scaling Level
@@ -90,6 +90,6 @@ func Scale0() int {
 //
 // Mul mul the scale, drop
 func Mul(x int) int {
-	s := Scale()
+	s := Scale1()
 	return x * s / 100
 }
diff --git a/screen/screen_c.h b/screen/screen_c.h
index bc7fba5..88dcd83 100644
--- a/screen/screen_c.h
+++ b/screen/screen_c.h
@@ -50,19 +50,20 @@ MMRectInt32 getScreenRect(int32_t display_id) {
 					(int32_t)DisplayWidth(display, screen),
 	                (int32_t)DisplayHeight(display, screen));
 #elif defined(IS_WINDOWS)
-	// if (GetSystemMetrics(SM_CMONITORS) == 1) {
+	if (GetSystemMetrics(SM_CMONITORS) == 1 
+			|| display_id == -1 || display_id == 0) {
  		return MMRectInt32Make(
 						(int32_t)0,
 						(int32_t)0,
 			 			(int32_t)GetSystemMetrics(SM_CXSCREEN),
  		                (int32_t)GetSystemMetrics(SM_CYSCREEN));
- 	// } else {
- 	// 	return MMRectInt32Make(
-	// 		 			(int32_t)GetSystemMetrics(SM_XVIRTUALSCREEN),
-	// 					(int32_t)GetSystemMetrics(SM_YVIRTUALSCREEN),
-	// 					(int32_t)GetSystemMetrics(SM_CXVIRTUALSCREEN),
- 	// 	                (int32_t)GetSystemMetrics(SM_CYVIRTUALSCREEN));
- 	// }
+ 	} else {
+ 		return MMRectInt32Make(
+			 			(int32_t)GetSystemMetrics(SM_XVIRTUALSCREEN),
+						(int32_t)GetSystemMetrics(SM_YVIRTUALSCREEN),
+						(int32_t)GetSystemMetrics(SM_CXVIRTUALSCREEN),
+ 		                (int32_t)GetSystemMetrics(SM_CYVIRTUALSCREEN));
+ 	}
 #endif
 }