[NTG-context] difference between a and b alternatives in \blackrule

Hello, What is the difference between a and b alternatives in \blackrule? http://wiki.contextgarden.net/Reference/en/setupblackrules#Description Regards, Vyatcheslav ___ If your question is of interest to others as

Re: [NTG-context] difference between a and b alternatives in \blackrule

Am 12.04.10 00:07, schrieb Vyatcheslav Yatskovsky: Hello, What is the difference between a and b alternatives in \blackrule? http://wiki.contextgarden.net/Reference/en/setupblackrules#Description Can you see it? \setupblackrules[width=2cm] \starttext text \blackrules[alternative=a] tex\par