Worked on the emilk/egui repository to implement Android back button support, enhancing cross-platform navigation consistency for mobile applications. The solution involved mapping Winit’s NamedKey::BrowserBack to egui’s Key::BrowserBack, ensuring that Android’s native back navigation is recognized within the GUI framework. Updates were made to the Key::ALL enumeration and its string representations to maintain API and serialization consistency. This work improved input handling reliability across devices and aligned egui’s key mapping with platform standards. The feature was delivered with clear, user-facing commit documentation, utilizing Rust for cross-platform and mobile development with a focus on robust GUI input integration.