For example mein agar 15x5 feet ka banner banao photoshop mein tou us k exact size mein yeh donga 180x60 inch Our phir dpi 72, print size and pixel size are equal.....and that's wat they want ok
btw mostly baray size ka agar panaflex design karna ho tou usay vector based software mein final karo kyu k us mein file heavy nai ho gi.....lekin photoshop mein file heavy ho jati hai.....mein mostly corel mein he banata hn.......sirf background ya Images ki setting photoshop mein 300 ya 400 dpi mein set kar k wapis corel mein set karta hn......