The entire panel at the top of the Staff Catalog page is the search form. The search form contains Search Panes, which give you different tools to use in your searches.

There are five Search Panes available on the Staff Catalog page: Keyword Search, Numeric Search, MARC Search, Browse, and Shelf Browse.

By default, the Staff Catalog page opens to the Keyword Search pane and searchs the highest-level library, but both of these settings can be changed in Search Preferences.