[oXygen-user] Oh icon my icon!

Apologies if this is a FAQ. I'm working on some "do this in oXygen" documentation, and would like to show the reader which button to click, e.g., for configuring a transformation scenario. I could, of course, use my computer's capture-a-snippet-of- the-screen utility. But it seems better (IMHO) to just use the original graphic, if readily available. Where in my oXygen/ directory would I find the icons? (I'm looking in version 16 either in Mac OS X or in GNU/Linux -- I don't have easy access to a Windows machine w/ oXygen.) (And yes, I use version 17, but this documentation is aimed at users of v 16. :-) Thanks.