Hi @Jim_G_Pappas
Try this:
Button Box( " Activate Filter ",
dfilter = dt << data filter( Mode( Show( 1 ), Include( 1 ) ), add filter() );
colObjList = {};
For( i=1, i<=NItems(col_name_list_chacter), i++,
InsertInto(colObjList, Column(col_name_list_chacter[i]) );
);
Eval(EvalExpr( dfilter << columns( Expr(colObjList) ) ) );
dfilter << Display( Single Category Display );
);
Note the "global" application of the option as you correctly described is achieved by apply the << Display( Single Category Display ) to the Data Filter Object, rather than each column
PDB