Add visualizer tips and hand landmark reference

README.md

@@ -264,3 +264,21 @@ If you use this dataset in your research, please cite:
 
 **Email:** shayan@dynamicintelligence.company  
 **Organization:** [Dynamic Intelligence](https://dynamicintelligence.company)
+
+---
+
+## 🖼️ Hand Landmark Reference
+
+![Hand Landmarks](https://huggingface.co/datasets/DynamicIntelligence/humanoid-robots-training-dataset/resolve/main/assets/hand_landmarks.png)
+
+Each hand has 21 tracked joints. The `observation.state` contains 6-DoF (x, y, z, yaw, pitch, roll) for each joint.
+
+---
+
+## 👁️ Visualizer Tips
+
+When using the [DI Hand Pose Sample Dataset Viewer](https://huggingface.co/spaces/DynamicIntelligence/dynamic_intelligence_sample_data):
+
+- **Enable plots**: Click the white checkbox next to joint names (e.g., `left_thumb_cmc_yaw_deg`) to show that data in the graph
+- **Why not all enabled by default?**: To prevent browser lag, only a few plots are active initially
+- **Full data access**: All joint data is available in the parquet files under `Files and versions`