Definitions
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## Definitions

System tray

  The system tray is an X client which owns a special manager selection on a given screen and provides container windows.

Selection owner window

  The selection owner window is the window belonging to the System Tray that owns the manager selection (as in `XGetSelectionOwner()`/`XSetSelectionOwner()`. Note that this probably is not the same window that's used to contain the system tray icons.

Tray icon

  The tray icon is a window to be embedded in the system tray.

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System Tray Protocol Specification | Home | Locating the system tray