As you click on a menu option the system launches a new Tab, typically displaying a data grid showing existing records within the option you have selected.
Clicking the New button to create new rows or clicking on an existing record in the grid will launch additional Tabs, allowing you to create, edit or simply compare multiple records at once.
To change between tabs, simply click on the title within the tab. Alternatively, drop down the arrow near the Tab count (to the right of the final tab) and pick the tab you would like to use.
To close a tab, simply select the tab and click on the small x to the right of the Tab title.