Hi. I'm using OmniGraffle to create a PDF with limited interactivity, basically using Properties: Actions > Jump Elsewhere to create hyperlinks from an element on one canvas/page to another canvas/page. This works really well, but I'd like to have a Back button on every page that jumps to the previously visited page, regardless of where that is in the order of pages (so a history-based Back). Is this possible? I've been eyeing the Actions > Run Script Option, but have no idea how to script :P Any help would be much appreciated. Thanks!