7.9.4 Changing the connection mode on the computer end
When the controller is in control mode, the keyboard and mouse on a connected computer cannot be used. If you need to use the keyboard or mouse on the computer, you can forcibly release control mode, and change it to standard mode.
To forcibly release control mode:
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On the connected computer, simultaneously press the Ctrl, Alt, and Delete keys.
The computer is now in standard mode, and you can operate it.
Note that when the connection mode of the connected computer is changed from control mode to standard mode, the system notifies the controller of the change of the connection mode. If the controller is in standard mode, then nothing happens. However, if the controller is in control mode, a dialog box appears to make sure that you really want to change the connection mode of the controller from control mode to standard mode. If you reply in this dialog box to allow the controller to be changed to standard mode, the controller is also changed to standard mode, and you can operate the computer from both the controller and the computer. However, if you do not allow the controller to be changed to standard mode, then the computer remains in control mode, and you cannot operate it from the computer end.