User Portlet User Portlet

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Just use parentheses: Graph[{1 -> 2, 3 -> 2, 1 -> 3}, EdgeStyle -> {(1 -> 2) -> Directive[Thickness[0.01`], RGBColor[0, 0, 1]], (3 -> 2) -> Directive[Thickness[0.005`], RGBColor[1, 0, 0]], (1 -> 3) -> ...