Reply To: 30X 40 Home › Forums › Questions & Answers › 30X 40 › Reply To: 30X 40 February 23, 2013 at 9:12 am #1020 RibbetKeymaster Hi Hallie, If you start with a collage layout which is square in shape, you can use the proportions slider at 43:57 or 57:43. This will give you an optimally sized collage that will have very little cropping on a 30×40″ poster.
