2880 x 2880 is the maximum stage size.
Kglad. Thanks so much for responding.
Does that mean total pixels must not exceed 2880x2880 = 8,294,400?
And, I could do 3840x1083 = 4,158,720.
no, max stage width is 2880 and max stage height is 2880.
those are just the stage dimensions though. unless you're viewing on a monitor larger than 2880x2880, there's not benefit to using a larger stage size. you can display much larger objects using scrolling within flash.
p.s. please mark helpful/correct responses, if there are any.