Microsoft has limited the maximum possible export dimensions to 2999×2249 pixels (for aspect ratio 1:1.3) which is comparable to the size of a photo from a 6- or 7-megapixel digital camera. the width (the height will be calculated automatically).
Unfortunately and inexplicably, Microsoft dropped this option ('Advanced resolution settings') in PowerPoint 2011.Ī quick-and-dirty solution would be to simply increase the pixel dimensions in the export settings.
