diff --git a/modules/v4d/include/opencv2/v4d/dialog.hpp b/modules/v4d/include/opencv2/v4d/dialog.hpp
index 2384b33f6..4850cc6e1 100644
--- a/modules/v4d/include/opencv2/v4d/dialog.hpp
+++ b/modules/v4d/include/opencv2/v4d/dialog.hpp
@@ -22,7 +22,6 @@ using std::string;
 class CustomTheme : public nanogui::Theme {
 public:
     CustomTheme(NVGcontext *ctx) : nanogui::Theme(ctx) {
-        m_window_drop_shadow_size = 10;
     }
 
     virtual ~CustomTheme() {
diff --git a/modules/v4d/src/detail/framebuffercontext.cpp b/modules/v4d/src/detail/framebuffercontext.cpp
index e048c0d87..3a63cf51d 100644
--- a/modules/v4d/src/detail/framebuffercontext.cpp
+++ b/modules/v4d/src/detail/framebuffercontext.cpp
@@ -288,8 +288,7 @@ void FrameBufferContext::init() {
     glfwSetCursorPosCallback(getGLFWWindow(), [](GLFWwindow* glfwWin, double x, double y) {
         V4D* v4d = reinterpret_cast<V4D*>(glfwGetWindowUserPointer(glfwWin));
         if(v4d->hasNguiCtx()) {
-            auto pt = v4d->fbCtx().toWindowCoord(cv::Point2f(x, y));
-            v4d->nguiCtx().screen().cursor_pos_callback_event(pt.x, pt.y);
+            v4d->nguiCtx().screen().cursor_pos_callback_event(x, y);
         }
 #ifndef __EMSCRIPTEN__
         auto cursor = v4d->getMousePosition();
@@ -337,8 +336,8 @@ void FrameBufferContext::init() {
                 std::vector<nanogui::Widget*> widgets;
                 if(v4d->hasNguiCtx()) {
                     for (auto* w : v4d->nguiCtx().screen().children()) {
-                        auto pt = v4d->fbCtx().toWindowCoord(v4d->getMousePosition());
-                        auto mousePos = nanogui::Vector2i(pt[0] / v4d->pixelRatioX(), pt[1] / v4d->pixelRatioY());
+                        auto pt = v4d->getMousePosition();
+                        auto mousePos = nanogui::Vector2i(pt[0], pt[1]);
                         if(cv::v4d::detail::contains_absolute(w, mousePos)) {
                             v4d->nguiCtx().screen().scroll_callback_event(x, y);
                             return;
@@ -638,22 +637,6 @@ void FrameBufferContext::execute(std::function<void(cv::UMat&)> fn) {
     });
 }
 
-cv::Point2f FrameBufferContext::toWindowCoord(const cv::Point2f& pt) {
-#ifdef __EMSCRIPTEN__
-    return cv::Point2f(pt.x * pixelRatioX(), pt.y * pixelRatioY());
-#else
-    return cv::Point2f(pt.x, pt.y);
-#endif
-}
-
-cv::Vec2f FrameBufferContext::toWindowCoord(const cv::Vec2f& pt) {
-#ifdef __EMSCRIPTEN__
-    return cv::Point2f(pt[0] * pixelRatioX(), pt[1] * pixelRatioY());
-#else
-    return cv::Point2f(pt[0], pt[1]);
-#endif
-}
-
 cv::ogl::Texture2D& FrameBufferContext::getTexture2D() {
     return *texture_;
 }
diff --git a/modules/v4d/src/detail/framebuffercontext.hpp b/modules/v4d/src/detail/framebuffercontext.hpp
index ef94077da..1592e9383 100644
--- a/modules/v4d/src/detail/framebuffercontext.hpp
+++ b/modules/v4d/src/detail/framebuffercontext.hpp
@@ -211,9 +211,6 @@ protected:
      */
     cv::ogl::Texture2D& getTexture2D();
 
-    cv::Point2f toWindowCoord(const cv::Point2f& pt);
-    cv::Vec2f toWindowCoord(const cv::Vec2f& pt);
-
     GLFWwindow* getGLFWWindow();
 
 #ifndef __EMSCRIPTEN__
diff --git a/modules/v4d/src/detail/nanoguicontext.cpp b/modules/v4d/src/detail/nanoguicontext.cpp
index 3454edaf4..d9f40d062 100644
--- a/modules/v4d/src/detail/nanoguicontext.cpp
+++ b/modules/v4d/src/detail/nanoguicontext.cpp
@@ -29,10 +29,7 @@ NanoguiContext::NanoguiContext(FrameBufferContext& fbContext) :
             screen_ = new nanogui::Screen(true, true, false);
             screen_->initialize(fbCtx().getGLFWWindow(), false);
             Size winSize = fbContext.getV4D().getWindowSize();
-#ifndef __EMSCRIPTEN__
             screen_->set_size({int(winSize.width / fbContext.getV4D().pixelRatioX()), int(winSize.height / fbContext.getV4D().pixelRatioY())});
-#endif
-            fbCtx().setWindowSize(fbCtx().size());
             context_ = screen_->nvg_context();
             form_ = new cv::v4d::FormHelper(screen_);
             if (!context_)