Changes

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}}.

A '''\{{cmd|VL''' }} counts as a hidden cell. To interrupt a vertical line, use an empty cell.