diff --git a/internal/ui/ui_glfw.go b/internal/ui/ui_glfw.go
index 45474dc79..d453e960c 100644
--- a/internal/ui/ui_glfw.go
+++ b/internal/ui/ui_glfw.go
@@ -101,8 +101,8 @@ func ScreenScale() int {
 	return currentUI.scale
 }
 
-func ActualScale() int {
-	return currentUI.actualScale()
+func ActualScreenScale() int {
+	return currentUI.actualScreenScale()
 }
 
 type userInterface struct {
@@ -147,7 +147,7 @@ func (u *userInterface) windowScale() int {
 	return u.scale * int(u.deviceScale)
 }
 
-func (u *userInterface) actualScale() int {
+func (u *userInterface) actualScreenScale() int {
 	return u.windowScale() * u.framebufferScale
 }
 
@@ -205,7 +205,7 @@ func (u *userInterface) setScreenSize(width, height, scale int) bool {
 	// To prevent hanging up, return asap if the width is too small.
 	// 252 is an arbitrary number and I guess this is small enough.
 	const minWindowWidth = 252
-	if width*u.actualScale() < minWindowWidth {
+	if width*u.actualScreenScale() < minWindowWidth {
 		u.scale = origScale
 		return false
 	}
diff --git a/internal/ui/ui_js.go b/internal/ui/ui_js.go
index 6b4f22650..6f850502c 100644
--- a/internal/ui/ui_js.go
+++ b/internal/ui/ui_js.go
@@ -50,7 +50,7 @@ func SwapBuffers() {
 }
 
 func SetScreenSize(width, height int) bool {
-	scale := canvas.Get("dataset").Get("ebitenScale").Int()
+	scale := canvas.Get("dataset").Get("ebitenScreenScale").Int()
 	return currentUI.setScreenSize(width, height, scale)
 }
 
@@ -60,11 +60,11 @@ func SetScreenScale(scale int) bool {
 }
 
 func ScreenScale() int {
-	return canvas.Get("dataset").Get("ebitenScale").Int()
+	return canvas.Get("dataset").Get("ebitenScreenScale").Int()
 }
 
-func ActualScale() int {
-	return canvas.Get("dataset").Get("ebitenActualScale").Int()
+func ActualScreenScale() int {
+	return canvas.Get("dataset").Get("ebitenActualScreenScale").Int()
 }
 
 var canvas *js.Object
@@ -226,7 +226,7 @@ func Init() *opengl.Context {
 }
 
 func setMouseCursorFromEvent(e *js.Object) {
-	scale := canvas.Get("dataset").Get("ebitenScale").Int()
+	scale := canvas.Get("dataset").Get("ebitenScreenScale").Int()
 	rect := canvas.Call("getBoundingClientRect")
 	x, y := e.Get("clientX").Int(), e.Get("clientY").Int()
 	x -= rect.Get("left").Int()
@@ -252,7 +252,7 @@ func (u *userInterface) start(width, height, scale int, title string) error {
 }
 
 func (*userInterface) size() (width, height int) {
-	a := canvas.Get("dataset").Get("ebitenActualScale").Int()
+	a := canvas.Get("dataset").Get("ebitenActualScreenScale").Int()
 	if a == 0 {
 		// a == 0 only on the initial state.
 		return
@@ -264,16 +264,16 @@ func (*userInterface) size() (width, height int) {
 
 func (u *userInterface) setScreenSize(width, height, scale int) bool {
 	w, h := u.size()
-	s := canvas.Get("dataset").Get("ebitenScale").Int()
+	s := canvas.Get("dataset").Get("ebitenScreenScale").Int()
 	if w == width && h == height && s == scale {
 		return false
 	}
 
-	actualScale := scale * devicePixelRatio()
-	canvas.Set("width", width*actualScale)
-	canvas.Set("height", height*actualScale)
-	canvas.Get("dataset").Set("ebitenScale", scale)
-	canvas.Get("dataset").Set("ebitenActualScale", actualScale)
+	actualScreenScale := scale * devicePixelRatio()
+	canvas.Set("width", width*actualScreenScale)
+	canvas.Set("height", height*actualScreenScale)
+	canvas.Get("dataset").Set("ebitenScreenScale", scale)
+	canvas.Get("dataset").Set("ebitenActualScreenScale", actualScreenScale)
 	canvasStyle := canvas.Get("style")
 
 	cssWidth := width * scale
diff --git a/run.go b/run.go
index 962f1d0a0..47c3d851f 100644
--- a/run.go
+++ b/run.go
@@ -70,7 +70,7 @@ func Run(f func(*Image) error, width, height, scale int, title string) error {
 	defer ui.Terminate()
 
 	glContext.Check()
-	graphicsContext, err := newGraphicsContext(width, height, ui.ActualScale())
+	graphicsContext, err := newGraphicsContext(width, height, ui.ActualScreenScale())
 	if err != nil {
 		return err
 	}
@@ -93,7 +93,7 @@ func Run(f func(*Image) error, width, height, scale int, title string) error {
 			}
 			if changed {
 				w, h := runContext.newScreenWidth, runContext.newScreenHeight
-				if err := graphicsContext.setSize(w, h, ui.ActualScale()); err != nil {
+				if err := graphicsContext.setSize(w, h, ui.ActualScreenScale()); err != nil {
 					return err
 				}
 			}