Developed and delivered a cross-course Notification Settings Sync feature for the Submitty/Submitty repository, enabling users to apply notification preferences across multiple courses with a single action. The work involved implementing new UI elements, including sync buttons and a multi-course popup with select-all and clear options, using JavaScript and PHP for both front end and full stack development. Manual end-to-end testing was conducted across virtual machine environments to ensure correct behavior and CI stability. The feature was designed to reduce administrative overhead for instructors and improve notification consistency, with documentation and rollout notes prepared to support a smooth deployment.