printing

so i dont know if anyone has heard the site Darkroom.tech but you basically set up your own print shop.. now all the photos i put up there with my camera i can put at any size. 5x7 all the way up to 30 x 40. when i try to put a photo ive taken with my mavic on there the only size i can put is...

Hey Guys, I've a Mavic Air and am helping out a friend by taking some aerial shots of his house - he wanted to get some printed up and then framed As you know - as regards the MA camera specs, the "effective pixels" is 12MP. I know this is maybe a broad question (and likely depends on the...