If you want to temporarily stop ClipManager from receiving clips, you can disable capture by toggling this menu option off. And you can also use Hotkey: CTRL-Q to switch. A check mark is shown against the menu option to indicate whether capture is currently on or off. It is always on when ClipManager starts up. If you stop capture clips, when you copy you will hear a warning sound  "Ding" if you have sound card or "De" from speaker of host.