NEC express5800 A2010b User Manual page 315

Chapter 3 Setup
Others
Important
key (Shift, Ctrl, Alt, PSC, Nlk, Windows-key).
The same as the key in a hardware keyboard.

In the state of Lock key is in pushed, reboot a KVM screen, when a virtual
keyboard is ended by the [X] button click of a virtual keyboard window, or the
"keyboard" - "finish".

When the special key (Shift, Ctrl, Alt, PSC, Nlk, Windows-key) is pressed, it
does not depend on depression of the Lock button, but a special key will be in
the state where it was locked, and will be highlighted.
Express5800/A1040b, A2040b, A2020b, A2010b User's Guide
7. Using Remote Management
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