Press Settings button on remote control.
Select Settings on screen.
Scroll down to System click right and select Accessibility.
Scroll down to Text magnification, switch on.
This has a very limited functionality on the TV guide, have a look and see.
From Accessibility you can also go to Screen reader,
this will read out the text on the TV guide.
But it will also read out any other text based info on screen and can be a bit annoying.
