diff --git a/customtkinter/draw_engine.py b/customtkinter/draw_engine.py
index 43671cd..8d062d2 100644
--- a/customtkinter/draw_engine.py
+++ b/customtkinter/draw_engine.py
@@ -75,11 +75,16 @@ class DrawEngine:
         else:
             inner_corner_radius = 0
 
-        if self.preferred_drawing_method == "polygon_shapes":
+        if overwrite_preferred_drawing_method is not None:
+            preferred_drawing_method = overwrite_preferred_drawing_method
+        else:
+            preferred_drawing_method = self.preferred_drawing_method
+
+        if preferred_drawing_method == "polygon_shapes":
             return self.__draw_rounded_rect_with_border_polygon_shapes(width, height, corner_radius, border_width, inner_corner_radius)
-        elif self.preferred_drawing_method == "font_shapes":
+        elif preferred_drawing_method == "font_shapes":
             return self.__draw_rounded_rect_with_border_font_shapes(width, height, corner_radius, border_width, inner_corner_radius, ())
-        elif self.preferred_drawing_method == "circle_shapes":
+        elif preferred_drawing_method == "circle_shapes":
             return self.__draw_rounded_rect_with_border_circle_shapes(width, height, corner_radius, border_width, inner_corner_radius)
 
     def __draw_rounded_rect_with_border_polygon_shapes(self, width: int, height: int, corner_radius: int, border_width: int, inner_corner_radius: int) -> bool:
diff --git a/examples/example_background_image.py b/examples/example_background_image.py
index e7b0292..5771843 100644
--- a/examples/example_background_image.py
+++ b/examples/example_background_image.py
@@ -23,6 +23,7 @@ class App(customtkinter.CTk):
         self.geometry(f"{App.WIDTH}x{App.HEIGHT}")
         self.minsize(App.WIDTH, App.HEIGHT)
         self.maxsize(App.WIDTH, App.HEIGHT)
+        self.resizable(False, False)
 
         self.protocol("WM_DELETE_WINDOW", self.on_closing)
 
diff --git a/examples/simple_example.py b/examples/simple_example.py
index f4cfa47..1973a49 100644
--- a/examples/simple_example.py
+++ b/examples/simple_example.py
@@ -56,8 +56,6 @@ radiobutton_1.pack(pady=y_padding, padx=10)
 radiobutton_2 = customtkinter.CTkRadioButton(master=frame_1, variable=radiobutton_var, value=2)
 radiobutton_2.pack(pady=y_padding, padx=10)
 
-s_var = tkinter.StringVar(value="on")
-
 switch_1 = customtkinter.CTkSwitch(master=frame_1)
 switch_1.pack(pady=y_padding, padx=10)