Hi Chris – When I open the HTML file in the Edge Browser, I can tab through the alphabet. I think that’s what they are saying but if you’re able to join our Open Discussion, we can get input from others too.
One thought that comes to mind, is to have links that allow the use to jump back up to the alphabet. Not sure about hiding letters, I wonder if that could be confusing. Again, folks in the group may have some suggestions for you.