Используйте Panel
, с опцией Alignment
:
Manipulate[
Panel[
If[Intersection[Row1, Row2] == {},
Style[Plus @@ {Plus @@ Row1, Plus @@ Row2}, Bold, 20], "Error"
],
ImageSize -> 150, Alignment -> Center, Appearance -> "Frameless"
],
{{Row1, {1}}, {1, 2, 3, 4, 5}, ControlType -> TogglerBar},
{{Row2, {2}}, {1, 2, 3, 4, 5}, ControlType -> TogglerBar}
]