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Kennedy, don't stop now! You're on a roll! Somewhere out there I know there's a real world analogy on the threshold of utterance. After struggling with current, amperage and voltage for some sixty years, someone gave this fuzzy-minded schoolteacher the image of a waterfall; for the first time, I held the terms clear in my mind. Mind you, they were less clear when I awoke the next morning, but for a few shining moments I knew that in a post-apocalyptic world I could confidently offer my services in the rewiring of New York. (That's a Canadian for you; wish the Yanks bad cess, but hey, that's where the jobs are!) Now apparently pixels are data like other data: electrical pulses that turn switches off and on. But I'm getting the impression that pixel data is bounded data, something like what Dan Margulis calls the "spots" that make up half-tone dots. If that ain't so, how do pixels differ from the stream of shut-it-offs and turn-it-ons that makes up, say, the mutual fund information coming to me every night via an old DOS financial program? If my question put this way strikes you as hopelessly muddled, then you at least have a notion of where most of us probably are, and where I certainly am. I don't *need* notions of voltage and stuff; when there's trouble along those lines, I call a guy and he comes (after a while) and I pay him money and everything's all right again. But making pictures on my Epsons is very important to me, and I wish I could grasp what these units are that carry the picture so effortlessly between my machines. Bob Bollini - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.