Hi,
sorting glyph is defined by rDBGrid.SortFieldName property which is set automatically if sorter is used or can be set also manually in runtime or design time, then glyph is shown.
So simply clear this property to hide any sort marker.
{ Defines which columns has sort marker, supports MultiField (e.g. FirtsName,LastName) }
property SortFieldName: string read FSortFieldName write SetSortFieldName;
{ Defines direction of sort marker }
property SortDesc: boolean read FSortDesc write SetSortDesc default false;
{ Defines directions in case of multifield, A=Asc, D=Desc, e.g. A,D,A }
property SortDirections: string read FSortDirections write SetSortDirections;
{ Defines sorter component - descendant of TrDBGridCustomSorter }
property Sorter: TrDBGridCustomSorter read FSorter write SetSorter;
I hope it helps
Tomas