I have a large monitor on a shelf over my keyboard. I can slide it towards me until my nose is practically touching the screen. Lol.

Also, I play from PDFs. Most PDF readers have a built-in Zoom function.

Yah I don't know anything about iPads, but it always drove my piano teacher nuts to see me stare at a page closely for 5 min, and then play the tune from memory! Worked almost every time.

I need it to be very big, about 1-3 measures on a typical iPad screen. I also need to advance with a pedal, because I need both hands to play my instaraments. Ie: saxophone, piano, timpani, snare/bass drum.

I either memorize everything or use gigantic 11x17 paper--copied three or four times so that each note is very very large. From there I memorize it.