Bonjour Guillaume!
What do you think about ----X---- where X is a width in pixel or the
screen
width percentage.
Could you please give an example in which article you need this feature?
I'm not all against adding new wiki tags, but only if we really need them. "Keep it simple!" is our motto :-)
(And the lag of article design features leads to our nice and unique Wikipedia corporate design. Someone in the heise.de article discussion said our site wouldn't be attractive enough for vandals - he meant it literally and as a compliment.)
Kurt