There are several options here which allow you to manipulate your search results, or refine them in a variety of different ways. You must put a full internet address. You can choose which format you wish to receive the records. The default is card format which gives bibliographic information, plus the shelf number. Citation will not include the shelf number.
Opac format includes all the subject headings, notes, etc.
Name tags and MARC tags are really only useful to librarians. If you wish to save your selected records to a file, do not fill in the email field . Instead just click on the send button. Click OK and then choose your file name and to which disk you will be saving. Once this is available, it is likely that new records will be omitted from this drop down menu.