The "Required Categories and Title Words" box lists all the categories that matching items must be in or words that must be in their titles.

Catgory names are written with italics to distinguish them from required title words.

To remove a word or category from the list of requirements, click on the button (only available if there is more than one required term).

To add an additional required term, type it in the text box and hit "Add". Note: you can include quote marks and parentheses as described in the search help documentation.