Update app.py

app.py

@@ -94,6 +94,33 @@ with gr.Blocks(title="Mesh Refinement Agent") as iface:
     
     gr.Markdown("## Mesh Refinement Prediction Demo")
 
+    gr.Markdown(
+'''### 📘 How to Use This Mesh Refinement Model
+
+1. **Upload a STEP file** (`.step` / `.stp`).
+OR: choose from one of the example STEP files at the bottom of the GUI and click *Run Mesh Prediction*
+2. **Set basic parameters:**
+   - *Thickness* (mm)  
+   - *Load Type* (bend from below or tension)  
+   - *Direction* (positive/negative)  
+   - *Load Scale* (low/medium/high)
+3. After uploading, the system automatically detects all faces.  
+   Select the **Load Face** from the dropdown.
+4. Choose a **3D visualization mode**:
+   - **Wireframe** – full mesh structure  
+   - **Highlight** – locally refined regions in red  
+   - **Heatmap** – continuous refinement magnitude
+5. Click **Run Mesh Prediction**.
+
+The model will generate:
+- A natural-language summary  
+- PNGs of the global and refined meshes  
+- An interactive 3D mesh viewer  
+- A downloadable `.msh` file
+
+This workflow reproduces the full ML-driven refinement pipeline used during training.'''
+    )
+
     gr.HTML("""
 <details style="margin-bottom: 18px;">
   <summary style="font-size: 18px; cursor: pointer; font-weight: bold;">