System Tray !full! File

System UI Analysis Unit Sources: Microsoft Developer Docs (Shell_NotifyIcon), Apple Human Interface Guidelines, GNOME Shell Integration Docs.

| Feature | Windows 10/11 | macOS (Ventura+) | Linux (GNOME 4x) | |---------|---------------|------------------|------------------| | | Always visible (right side) | Collapsible; hidden by default | Top bar; extensions needed | | User control | Drag to overflow / hide | System Settings > Control Center | Extension manager (e.g., KStatusNotifierItem) | | Programmatic access | Shell_NotifyIcon | NSStatusBar (AppKit) | libappindicator / Ayatana indicators | | Modern trend | Reduced tray; icons hidden by default | Deprecating menu bar extras | Disabled by default in Vanilla GNOME | system tray

When an application is in the tray, it exists in a state of "functional limbo." It’s not closed, but it isn't the primary focus of your attention. This is perfect for utility apps like: System UI Analysis Unit Sources: Microsoft Developer Docs

However, as with all good things in software design, developers abused it. Apple Human Interface Guidelines