diff --git a/waypoint_manager/scripts/devel_GUI.py b/waypoint_manager/scripts/devel_GUI.py
index c995c6b..05b3fc2 100755
--- a/waypoint_manager/scripts/devel_GUI.py
+++ b/waypoint_manager/scripts/devel_GUI.py
@@ -76,11 +76,12 @@
 		self.point_rad = 10
 		origin = self.__map_yaml['origin'] # originは地図上の原点から画像の左下までの距離[x,y](m)
 		self.map_resolution = self.__map_yaml['resolution']
+		# 画像上の原点座標を保持（左上から横x, 縦y）
 		self.img_origin = [-origin[0]/self.map_resolution, self.__map_img_pil.height+origin[1]/self.map_resolution, 1]
 		self.plot_origin()
 
 		## waypoints.yamlからウェイポイント情報を取得し、画像にポイントを描画
-		self.waypoints_id = np.array([], np.uint8)
+		self.waypoints_id = np.array([], np.uint16)
 		self.plot_waypoints()
 
 		## マウスイベントに対するコールバックを設定
@@ -111,7 +112,7 @@
 		map_img_pil = Image.open(Path(str(map_path)+'.pgm'))   # .pgmをplillowで読み込む
 		with open(str(map_path)+'.yaml') as file:   # .yamlを読み込む
 			map_yaml = ruamel.yaml.YAML().load(file)
-		
+		self.master.title(map_path.name + " - " + self.master.title())
 		return map_img_pil, map_yaml    # この2つの変数を戻り値とする
 	
 
@@ -124,6 +125,7 @@
 		file_path = Path('..','..','waypoint_nav','param','waypoints.yaml')
 		with open(file_path) as file:
 			waypoints = ruamel.yaml.YAML().load(file)
+		self.master.title(file_path.name + " - " + self.master.title())
 		return waypoints, file_path
 
 
@@ -156,7 +158,7 @@
 		if len(self.waypoints_id) != len(points):
 			for id in self.waypoints_id:
 				self.canvas.delete(id)
-			self.waypoints_id = np.array([], np.uint8)
+			self.waypoints_id = np.array([], np.uint16)
 		# 全てのウェイポイントを描画
 		for i in range(len(points)):
 			img_x = float(points[i]['point']['x']) / self.map_resolution + self.img_origin[0]