Hello all. I am new on here, so please forgive me for asking obvious questions. I am wanting to design digital art to print fabric - the finished project will be 90x90cm and the printer is asking for a minimum of 300dpi. My designs are made up of layers of photographs and images with added shapes and lines. When I create at the actual print size the end file comes out at less than 100dpi. I saw a tutorial which explained that to get a higher dpi, work larger and then re-size at the end - but when I try to do that everything freezes up. Am I attempting to do something impossible?