The text display I use is 40x3 characters, not a lot. I implemented a local 40x30 copy that can be scrolled around in with Alt-arrowkeys, a bit like looking at the print-out on an old paper terminal. The primary MCU does not have to deal with any of the scrolling, and it is possible to actually get some overview on printed stuff.

I'd really like more than 30 lines back-buffer, but the Mini Pro MCU is very limited on RAM, so this is what's possible with the HW at hand.