Update app.py

app.py

@@ -238,7 +238,7 @@ with gr.Blocks(
     theme=gr.themes.Soft(),
 ) as demo:
     gr.Markdown("# CellposeCellCounter")
-    gr.Markdown("For accurate cell confluency, crop the image to display only desired area.")
+    gr.Markdown("For accurate cell confluency, crop the image to display only desired area. Note that some image file types are not yet supported. PNG and JPEG are preferred.")
 
     # Define State components to store masks and image data across function calls
     masks_state = gr.State(value=None)