Hello Haegie - fairly expensively! You'll need a USB2.0 powered hub - I used an Amazon Basics one - (to maintain the back-up USB facility). a Startech USB2.0 - VGA video card adaptor, and a touch-screen monitor - I used a Dell S2240T - at a total cost of around €440. The powered hub plugs into the 'USB to Device' port on the Montage, and into that you plug your normal back-up USB stick and the Startech video card adaptor, into the other end of which plugs your VGA cable to the monitor. This particular system works, as I've been using it for several months now. The Montage screen goes blank when the monitor starts up, but no loss. The monitor lights up with a green screen initially. then changes to the Montage screen as the Montage fires up. It doesn't always work - if it remains green when the Montage is fired up, switch the Montage off, and then on again. Usually works, but rarely it needs to be switched off and on again. No idea why this happens, but it does. I recommend it highly as a thoroughly working system, but you may need to make yourself an extended stylus out of aluminium tube to avoid leaning forward all the time - which is why I wanted to get an external monitor in the first place ... about 15" (35 - 40cm) will do it.

Thank you ROD. It was very helpfu.