Show Fontmatrix in System Tray enables or disables system-tray functionality.

Close to system tray sends the main window to the system tray when its close button is clicked. Restore via a left click on the icon, or right-click → Restore.

Start minimized to system tray is useful when you want Fontmatrix running in the background but not opening its window at startup.

Show "All" actions adds Activate all / Deactivate all to the tray menu.

Ask confirmation when activating or deactivating all fonts and Ask confirmation when activating or deactivating fonts by tags add safety prompts.