D-Link KVM-221 - KVM / Audio Switch Quick Installation Manual page 9

You can use your keyboard to switch between your computers. Press
the Scroll Lock key twice to enter the Hot Key switching mode. A beep
confirms that the Hot Key switching mode is activated.
Scroll Lock + Scroll Lock + 1 :
Scroll Lock + Scroll Lock + 2 :
Scroll Lock + Scroll Lock + F1 : Switches to PC1 with audio
Scroll Lock + Scroll Lock + F2 : Switches to PC2 with audio
Scroll Lock + Scroll Lock + g : Switches to the next PC
Scroll Lock + Scroll Lock + f : Switches to the previous PC
Scroll Lock + Scroll Lock + B :
Scroll Lock + Scroll Lock + M : Resets the mouse and keyboard.
Scroll Lock + Scroll Lock + S :
Spacebar :

Switching the KVM-221
Hot Key Menu
Switching the KVM-1
Switches to PC1 only.
Switches to PC2 only.
signal synchronously.
signal synchronously.
with audio signal synchronously.
with audio signal synchronously.
Enable/Disable Beep.
Auto-Scan Mode automatically
switches between computers
every 10 seconds (Monitor Only).
Exits Auto Scan Mode.
D-Link KVM-1 Quick Install Guide