Important: the icon is hidden after installation in Windows 10/8/7/Vista:
(1) In this case, click on the arrow in the task bar on the lower right and
(2) Drag the Clipboard Master icon down into the task bar.
The tray icon is the Clipboard Master symbol in the task bar on the lower right:
The tray icon gives you access to the clipboards, entries, settings and functions of Clipboard Master: to do so, click on the tray icon with the left or right mouse button.