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Since the FAQ entry explains how to avoid horizontal scrolling, the OP simply needs to do the opposite.
Huh? Avoiding horizontal scrolling on a page that is intended to scroll vertically is not remotely the opposite to making a page that is intended to scroll horizontally.
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The FAQ entry also mentions that horizontal scrolling is an annoyance.
Perhaps, and if the FAQ is talking about horizontal scrolling in a page intended to scroll vertically, this is true. If the FAQ purports to instruct people that they should not make pages intended to scroll horizontally, then it's just more fascist nonsense. (But I think the first thing is more likely.)
Do you think there is something wrong with the Artofar-
Torium. (Only a single linebreak there, but I don't trust this junk software not to mess it up.)
http://imaginatorium.org/art/arto.htm(I don't think you are reading the original question properly - and it is extremely clearly expressed.)