Update app.py

app.py

@@ -459,7 +459,7 @@ with gr.Blocks() as demo:
                     vis_frame_type = gr.Radio(label="Propagation level", choices=["check", "render"], value="check", scale=2)
                     propagate_btn = gr.Button("Propagate", scale=1)
                 reset_prpgt_brn = gr.Button("Reset", scale=0.75, visible=False)
-                output_propagated = gr.Gallery(label="Propagated Mask samples gallery", visible=False)
+                output_propagated = gr.Gallery(label="Propagated Mask samples gallery", columns=4, visible=False)
                 output_video = gr.Video(visible=False)
                 # output_result_mask = gr.Image()