IOGear GCS634U - Manual (Page 14)

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[HKM] [F4] – This will type out a list of current KVM settings. Open a word processor before using this
command in order to see how the KVM is configured.
[HKM] [F5] – This will reset the USB ports on the switch, and may clear up any keyboard or mouse
problems.
[HKM] [R] [Enter] – This will reset all KVM settings to their defaults.