You can sort all columns on your order dashboard by clicking on the column header.
This means you can sort by Name/Event, by Type of order, by Submitted Date, by order Status, and by Retail value.
To sort, simply click a column header. It will sort and if you need it in reverse order simply click the column header again.
For example, to see orders sorted by Submitted date click "Submitted" it will sort them from newest to oldest (at the bottom). If you wish to sort with oldest at the top of the column, simply click "Submitted" again and it will sort oldest to newest (at the bottom).