I am configuring a Portal TV for my grand-parents. They can't see very well so I try to have the best display for them: high contrast, very large text and TalkBack (green lines around selected button).
I want it to be as simple as possible.

When activating TalkBack, green lines appear around selected button: good.
You may have to reboot Portal TV to hear the voice also.

Then, depending on the size of the text (default, large, very large), the main page layout varies.

With default and large sizes, you can see every button (Facebook Watch, etc.) but with very large size, you cannot see Settings! You cannot reach it. How do you deactivate TalkBack? You are stuck!

The workaround is to hard reboot the Portal TV and quickly go to settings as soon as the main page is displayed.

With default and large sizes also, the navigation between icons has some issues, you press left to select an icon on the left but another icon is selected instead, very annoying!

Please correct this issue, TalkBack:
- has flaws on the main page with default and large text,
- cannot be used with very large text.

And if you can, try to test Portal TV with 70+-year-old people, simplify it like a dumb phone!

Won't somebody please think of the elders? ;-)