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When setting some text all in lowercase with a sans serif font like Helvetica neue should I use the regular size numbers (that lines up with capital letters) or make them a smaller point size ( 80 or 90% smaller)?
I don't know if smaller numbers are available or even appropriate for that font.
I read in "Rules of typography" that one shouldn't use lining numbers with lower case and I don't know that applies to all fonts and if there are exceptions to that rule.