30X 40 Home › Forums › Questions & Answers › 30X 40 This topic has 1 reply, 2 voices, and was last updated 11 years, 6 months ago by Ribbet. Viewing 1 reply thread Author Posts February 23, 2013 at 9:09 am #1014 Reply hallie wassermanGuest I want to create a 30X40 poster of my collage. What dimensions do I need to use? February 23, 2013 at 9:12 am #1020 Reply 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. Author Posts Viewing 1 reply thread Reply To: 30X 40 Your information: Name (required): Mail (will not be published) (required): Website: Cancel Submit