How does the letter board on Wheel of Fortune work? and how has the technology changed over the years on it?

Question

I like Game Shows.

Answer 1

They used to have it where Vanna actually had to flip the little boards around and they would change out the letters during breaks, but now they just use little screens and she has to "touch" them to bring up the letter. She really isn't needed anymore..

Answer 2

not much ..otherwise Vanna would be out of job