Actually, there is a way to increase the size of the Guide text. It's done by changing the Program Guide screen to SD instead of HD. Tech. Support talked me through the steps.
Here's how you do this (it's far from intuitive).
Settings -->TV-->Video Settings --> Graphics Settings
You are then presented with a choice of HD or SD
Next you see a screen asking you what kind of TV you have (HD or SD) --- Select SD, EVEN IF YOU HAVE AN HD TV
(if you select HD, your request to display Guide in SD format will be ignored)
It does make the text easier to read, but displays less info. Works for me, keeps me from having to get up and walking to the TV to read the guide.
djb, Thanks for laying down the steps. I couldn't remember them, when I posted that there was a work around.
I just realized that the original poster was the one who came back and said there is a work around. A gentle suggestion - when you find a solution it would be nice to share how to do it with others.