Update app.py

app.py

@@ -591,6 +591,7 @@ with gr.Blocks(title="GazeAlign", css=_CSS) as demo:
                 label=_FIXATION_LABEL, type="pil", interactive=False,
                 visible=False, height=440,
             )
+            delete_btn = gr.Button("🗑  Delete image / load another", visible=False)
             fix_status = gr.Markdown("")
 
             # Load-from-file menu — collapsed; click the header to reveal.
@@ -612,7 +613,6 @@ with gr.Blocks(title="GazeAlign", css=_CSS) as demo:
                     label="Fixation duration weight", scale=3,
                 )
                 clear_btn = gr.Button("✕ Clear fixations", scale=2)
-            delete_btn = gr.Button("Delete image", visible=False)
 
             preset_dd = gr.Dropdown(
                 choices=list(PRESETS.keys()),