For all your PC requirements
OmniGraffle Pro [MAC]
Need a diagram, process chart, quick page-layout, website wireframe or graphic design? OmniGraffle can help you make eye-popping graphic documents quickly by keeping lines connected to shapes even when they're moved, providing powerful styling tools, and magically organizing diagrams with just one click. Whether you need a quick sketch or an epic technical figure, OmniGraffle keeps it gorgeously understandable.
OmniGraffle Pro for Mac is the professional edition of OmniGraffle; a standard edition is also available for half the price. (See below for a list of the features in this Pro edition.) OmniGraffle is also available for iPad.
For simple question you can call to phone number.
For the technical questions is more better to write us email from our Support System.