The search query form is available only when you are on a page with search query capability, such as the Inbox page under Agent. You can specify your search query by entering it in the Search bar in the interface. You may also build a search query anywhere you see the Query setting in a configuration page, for example when adding a notification through Settings > Notifications.
A query may have several options that you select from when building the query, such as true or false, or selecting an agent or team. If the query does include ‘such as’ options, the search will launch once you click on the option to select it. Or, if the query requires only text, you can hit the Enter key on your keyboard at the end of the text to launch the search.