Deactivate virtual keyboard when physical keyboard connected.
I was having issues with deactivating the virtual keyboard after updating firmware and all I did was following this instructions and toggling a couple times the option and it worked. So I wanted to share:
To deactivate the on-screen virtual keyboard when a physical Bluetooth or OTG keyboard is connected to your Boox device, follow these steps:
Method 1: The Quick Settings Toggle
Most modern Onyx Boox firmware versions include a direct toggle in the Physical Keyboard settings.
Connect your physical keyboard via Bluetooth or USB.
Go to Settings > Languages & Input.
Tap on Physical Keyboard.
Look for a toggle switch labeled Show virtual keyboard (or "Keep on-screen keyboard").
Turn this OFF. The virtual keyboard will now stay hidden as long as the physical one is active.