We are using third party app like MobiLock to disable hardware keys on devices. Please refer to this blog : https://blog.mobilock.in/can-better-manage-android-devices-disabling-hardware-keys/

Also, the main purpose for the video is so you can see where you are about to draw. My tablet doesn't have any hover or pressure, so I just have to guess where on the screen it is going to draw. If I had a visual that updated even once a second, that would be enough to glance down and see what I'm going to draw on and then look back up at the screen. to continue drawing. Not overly necessary, but very helpful.

Hi, GFXTablet it's an nice possible for have an huge Touchpad, with adding left and right mouse"key" at bottom. Really well for Grandy and Granpa but just need mousekey's and doubletouch-recognition maby add by sliding down (or double-touch and scrolling down), the scrolling the page .. maby for both systems, linux and WinNT, because Reactos it's coming.. with it it is really easy for operate an computer if they have no money for an new and modern Touchscreen with the money of pension with a tablet can make much more and helps much more .. best regards Blacky