basis of the position of the cursor 212 could also be displayed on the right next to the field 202 but this has not been shown in fig5 for the sake of clarity a field 222 shows that in field 220 the values are shown which are expected if the type of optimization which is selected with the cursor 212 is selected and serves to determine the operating parameters the operator can therefore try out different settings of the cursor 212 within the body 210 and determine in what way the selected optimization acts on the values for the working result the operator can therefore very easily determine which position of the cursor 212 and therefore which optimization appears most appropriate to him the operator also learns the relationships between the type of optimization and the expected values for the working result with the result that a learning effect for inexperienced and even for experienced operators occurs in particular at the start of a harvesting season the operator can if appropriate also compare a setting which has been predefined by a client with an optimized setting and propose to the client that the predefinition or setting be changed for this purpose the operator can show the operator assistance system 64 to the client in situ or can transmit the contents of the display device 66 to the client via the third communication interface 74 furthermore it would also be conceivable that the optimization which is to be used is already predefined with the order cf step 104 and cannot be changed by.