I'd tried to make this pics, as comparison the size of the text into the last document is less than 10: it's 8 or 9.
The 3rd image is using the devige in landscape, it spits the document (A4) in -less than-half.
https://imgur.com/a/PZfgUyq
Personally I would prefer in landscape and using the buttons instead of scrolling, or directly in portraid it's quite legible imho. The scrolling itself it's sure not the super fastest. Pics are not the best, too.
Edit: tried two pics in daylight,
https://imgur.com/a/enBnF7A