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{{todo|regenerate examples after the wiki context has been updated}}
→Block matrices with vertical and/or horizontal lines
\stopformula
</context>
The two commands {{cmd|VL}} and {{cmd|HL}} take an optional parameter which defines the thickness of the rule and its color. So {{cmd|HL|[3,red]}} will produce a red horizontal rule three times thicker than the default matrix rule. The rule thickness for a specific matrix is defined with the {{code|1=[rulethickness=]}} parameter of {{cmd|definemathmatrix}}.
