I've created an A1 size poster (150DPI) with the width and length dimensions matching that of A1. I'm getting it printed at a place in town, however they said they preferred it to be in PDF format. I'm not sure how to save it as an A1 PDF - if I go to print then 'save as PDF' I don't get an A1 option, or the ability to enter custom info. How would I go about doing this? EDIT: DOH! Found it under Export options which I overlooked! Problem solved!