Increase the size of the key pads on the Displayotron

Did a search for this but didn’t find anything.
The pads are a bit small for adult fingers.
What is the recommended way/material to make them bigger, say 2cm?

I’m not sure if it’s even possible! You would have to very, very carefully scratch away the resist over the top of the touch pads to get to the bare copper, then perhaps use copper tape to extend those. I don’t think it would work though.