How can I eliminate the section PREFIX
Hi Peter. Great Question! You can't eliminate a field. But, if it is something that you do not need in your batches, you can sometimes hide the field. You can always move the fields around too and put the prefix field at the bottom of the form. It will stay that way until you reset the field order.
Here is a link to an article about hiding fields:
Here is a link to an article about changing the order of the indexing fields.
I hope that is helpful. If not, please expand on what you are hoping to do with the prefix field.