In uk.transport.london message
dia.com, Fri, 12 Feb 2010 15:30:59, Richard J.
posted:

The technology might be OK if the resolution is high enough, but in
practice you get crude letter shapes with the letters g,j,p,q,y not
descending properly. If "backward" means retaining the elegant and
highly legible Johnston typeface, I'm all for it.

I have had 7-pin printers which used the middle 5 pins for "e", the
upper 6 for "E", the lower 6 for "g", and all bar the second for "j".
Characters were 7 dots wide, with the restriction that no pin could fire
in adjacent columns. The result was surprisingly legible, given those
limitations. Descenders should descend "below the line", but do not
need to descend far if, for "gpqy" the bode of the character does not
use the sixth row. Someone tell TfL.

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