> requiring an irregular scan pattern Yes - you've just made me aware of how and why scanning a ribbon always felt somehow more physically exerting to me, the

> requiring an irregular scan pattern Yes - you've just made me aware of how and why scanning a ribbon always felt somehow more physically exerting to me, the 'manual work' of dragging my eyeballs around and about, instead of in a straight line. Plus with buttons of different sizes, you have to 'zoom' your attention in and out to catch them all; while the harder I try to find something, the more I naturally tend to lean forward and crane into the small details, and miss the wood for the trees.