Hi, I use midjourney to make my ai posters. Midjourney can make the images at the A,2,3,4,5 aspect ratio, but cant make the images at the A0 size. Meaning in order to offer A0 as a poster size option i have to upscale, the midjourney image which is A2 etc size. but upscaling means a reduction in quality and sharpness. I would prefer to make A0 midjourney image and then downscale from there, but midjourney wont let me make an A0 size image. is this something someone can help with ? How does everyone else make A0 and A1 size posters while maintaining good quality ?

Hi ! Just wondering if anyone could give some advice. I want to download my finished canvas from canva, chat GPT is telling me to download it as a flattened PDF print document, but some messages on here are saying to download it as a PNG and then match the pixels to the poster size while not exceeding 75mb. Does it matter which way I do it or is it all the same ?