Which section of the ServiceNow UI allows you to perform a global search?
The banner spans the top of every page. It contains a logo, navigation menus, the title of the page in the content frame, global search, help, notifications, and a user menu.
https://developer.servicenow.com/dev.do#!/learn/learning-plans/washingtondc/new_to_servicenow/app_store_learnv2_buildmyfirstapp_washingtondc_getting_around_in_servicenow