You use the New Query tab to create and edit queries, and to view and manage query results. Consider using the this tab for initial query development. The query and its results are both displayed within the tab which makes it easy to quickly check query results, modify the query as needed, and then re-run the query. When you are satisfied that the query is performing as expected, you can move it to the Query Browser and save it for use in future sessions.
The New Query tab has two panes, each with its own toolbar: