--- sidebar_position: 6 --- # Development Welcome to the Development section of OpenPanel, where developers can dive into extending the capabilities of our platform. OpenPanel is designed with flexibility in mind, allowing you to enhance its functionality and tailor it to your specific needs. ## Building Custom Modules Developers have the opportunity to create custom modules that seamlessly integrate with OpenPanel. These modules can introduce new features, extend existing functionalities, and adapt the platform to unique use cases. Stay tuned for the upcoming addition of our Module Development Guide, providing a comprehensive walkthrough on creating and seamlessly integrating custom modules into OpenPanel. Exciting developments are on the horizon as we enhance our resources to empower developers in shaping the future of OpenPanel. ## Custom Code ### Custom CSS To add custom CSS code to OpenPanel interface, edit file `/usr/local/panel/templates/custom_code/in_header.html` and put your custom code inside. Please note ```bash nano /usr/local/panel/templates/custom_code/custom.css ``` ### Custom JS ```bash nano /usr/local/panel/templates/custom_code/custom.js ``` ### Code in Header To insert custom code within the `` tag of the OpenPanel interface, modify the content of the file located at `/usr/local/panel/templates/custom_code/in_header.html` and include your custom code within it. ```bash nano /usr/local/panel/templates/custom_code/in_header.html ``` ### Code in Footer To insert custom code within the `