To sort records by a single column, click inside the field header. This sorts records by close date, in ascending order. An arrow appears in the field header.
Click inside the field header again to sort by descending order. Click again to reset the default order.
Once you have sorted a single field, you can continue to sort by additional fields. Right-click in another field and clickor to sort the records in that field.
Left-clicking in any field header removes all nested sorting that you have built in other fields, while sorting only that field.