To sort the loads in a particular table, click the arrow icon next to the field header.
This will open a menu where you can select to sort either by ascending or descending.
Fields with the arrow showing as are not being sorted by. Fields with the arrow showing as are being sorted by ascending order. Fields with the arrow showing as are being sorted by descending order.
Certain tabs have primary and secondary sorting available. The first field set to be sorted will be shown with a for primary. The next field sorted after that will be be shown with an for secondary.
These sorts can be removed by clicking on the arrow next to the sorted field and then clicking the Clear option.
If the primary sort is removed, then the secondary sort will be set to primary.