Columns[0].ImageOptions.Visible:=true;
procedure TMainForm.UniDBGrid5FieldImageURL(const Column: TUniDBGridColumn;
const AField: TField; var OutImageURL: string);
begin
if SameText(AField.FieldName, 'SIGN_ID') then
OutImageURL := '\SIGNS\Sign'+AField.AsString+'.png';
end;