1. Package Introduction | 2. Installation and Data Preparation | 2.1 Package Installation | 2.2 Loading Example Data | 3. Basic Visualization | 3.1 Simple Organ Visualization | 3.2 Understanding Output Structure | 4. Core Features | 4.1 Multi-Species Support | 4.2 Organ System Filtering | 4.3 Advanced Color Configuration | Using RColorBrewer Palettes | Custom Color Gradients | Separate Bar Chart Colors | 4.4 Bar Chart Configuration | 4.5 Organ Name Mapping and Standardization | 4.6 Data Aggregation Methods | 4.7 Display Options | 5. Advanced Usage | 5.1 Custom Organ System Mapping | 5.2 Column Name Customization | 5.3 Saving Results | 6. Color System Priority | Priority Order: | Example demonstrating priority: | 7. Troubleshooting Common Issues | 7.1 Missing Organ Coordinates | 7.2 Invalid Color Specifications | 7.3 Installation Issues | 8. Performance Tips | 8.1 For Large Datasets | 8.2 High-Resolution Output | 9. Summary