diff --git a/src/jl-graphic/app/JlGraphicApp.ts b/src/jl-graphic/app/JlGraphicApp.ts
index 4be56ea..5cf08f3 100644
--- a/src/jl-graphic/app/JlGraphicApp.ts
+++ b/src/jl-graphic/app/JlGraphicApp.ts
@@ -737,7 +737,7 @@ export class GraphicApp extends EventEmitter<GraphicAppEvents> {
   deleteGraphics(...graphics: JlGraphic[]): JlGraphic[] {
     const dels = graphics.filter((g) => {
       if (
-        this._options?.isSupportDeletion &&
+        this._options?.isSupportDeletion == undefined ||
         this._options.isSupportDeletion(g)
       ) {
         this.doDeleteGraphics(g);