Update app.py

app.py

@@ -404,7 +404,7 @@ with gr.Blocks() as demo:
                     video_in = gr.Video(label="Video IN")
             
             with gr.Column():
-                working_frame = gr.Dropdown(label="working frame ID", choices=[""], value=None, visible=False, allow_custom_value=True)
+                working_frame = gr.Dropdown(label="working frame ID", choices=[""], value=None, visible=True, allow_custom_value=True, interactive=True)
                 output_result = gr.Image(label="current working mask ref")
                 with gr.Row():
                     vis_frame_type = gr.Radio(label="Propagation level", choices=["check", "render"], value="check", scale=2)