I'm not completely certain about this answer. The information I have does not fully address whether you can use the KVM switch without going through the monitor menu or if there is a specific keyboard shortcut for seamless switching between screens. Typically, KVM switches require some form of input to switch between devices, often through a button on the switch itself or through software if it supports keyboard shortcuts. For precise details, I recommend consulting the monitor's user manual or contacting LG's customer support for more specific guidance.