[fjordaan]

As an information architect, the single most valuable improvement to OmniGraffle would be master elements -- for objects that are used frequently within a document, such as headers or footers. A change to a master is reflected everywhere the master is used.

This has been requested many times before, e.g.
11/2007: http://forums.omnigroup.com/showthre...hlight=masters
3/2007: http://forums.omnigroup.com/showthre...hlight=masters
4/2009: http://forums.omnigroup.com/showthre...ghlight=master
7/2009: http://forums.omnigroup.com/showthread.php?t=12961

In none of them have Omni representatives responded. Could you please let us know whether this feature is on the OmniGraffle roadmap?

If not, as much as I like Omnigraffle, for my next large wireframing job I'm going to move to Axure. http://www.axure.com/tourWireframe.aspx

Take a scenario: Let's say in my website wireframes the search box design needs to change, adding an Advanced Search link, say. That means I have to copy and paste the thing about 90 times across my entire document. Master canvases do not solve this problem. At best, I can use them for the header, as that's the only element that usually doesn't change position on the page.