diff --git a/Editor/ScenePartitionSOEditor.cs b/Editor/ScenePartitionSOEditor.cs
index 9b52d61..b815a0f 100644
--- a/Editor/ScenePartitionSOEditor.cs
+++ b/Editor/ScenePartitionSOEditor.cs
@@ -8,7 +8,6 @@ public class ScenePartitionSOEditor : UnityEditor.Editor
     {
         private ulong id = 0;
         private int gridId = 0;
-        private bool foldoutGroupEnabled = false;
 
         public override void OnInspectorGUI()
         {
@@ -61,6 +60,8 @@ public override void OnInspectorGUI()
                     scenePartitionSO.Save();
                 }
 
+                EditorGUIUtils.HorizontalLine();
+
                 using (new EditorGUILayout.HorizontalScope())
                 {
                     id = (ulong)EditorGUILayout.LongField("id", (long)id);