It is proposed a material manipulating device (24), preferably a grapple, adapted to be supported by a suspension (26), whereas the material manipulating device (24) is provided with at least one guide means (32) adapted to indicate the location of the material manipulating device (24) at least with respect to the material (19) to be manipulated, a work vehicle (10) comprising at least one such material manipulating device (24) and a method for operating such material manipulating device (24) or work vehicle (10) respectively.