afaik its not possible, but interested to see if anyone has any ideas? If not, it would be a really nice feature to have, enabling heads up displays, etc
If you look at the ETK800 center screen (between speedo and rpm gauge) it actually is 'alpha'. If you move that screen around you will notice that only the digits will appear. Heads up display has been one of my ideas for a longer time and if I had the time I would have made one for sure.