Update app.py

app.py

@@ -255,7 +255,7 @@ with gr.Blocks(title="PDCNet Ensemble Demo", css=css) as demo:
             btn_predict.click(predict_single, inputs=[in_payload, in_linker, in_peptide], outputs=out_result)
             
         with gr.TabItem("Batch Prediction (File)"):
-            gr.Markdown("### Upload a CSV or Excel file to process many molecules at once.")
+            gr.Markdown("### Upload a CSV or Excel file to process many molecules at once. Must have Payload, Linker and Peptide columns.")
             
             # UI UPDATE: Stacked vertically (No gr.Row)
             file_input = gr.File(label="Upload Dataset")