I have only just started to use OmniGraffle so please excuse if this is a simple question. I have created a single A4 page canvas with a layer containing header and footer information. On a second layer, I would like to generate a diagram and use the auto-layout feature of the diagrams, but when I start OmniGraffle places the centre subject off the edge of the page. Is there anyway to define the starting location for a diagram on a page?