|a.||Go to the first item (e.g., county) you want & left-click on it.|
|b.||Scroll to the next item you want and then, while holding down the CTRL key, left-click on it. Now two items are selected.|
|c.||Repeat step b for as many items as you want.|
Caution: If you ever forget to hold down the CTRL key when left-clicking, you'll "unselect" all those you've already done & will have to start over.