You can re-sort records listed in a selection grid by clicking on the column header by which you want to sort them.

Click on the header a second time to reverse the order of the items.

The red arrow in the column header indicates the sort direction.

To sort by more than one column header, click on the header you want to sort by first.

Then, hold down the Ctrl key while selecting the additional headings in the order by which you want the records sorted.

In the example below, the attendees are sorted first by attendee type, and then by last name within each group of attendee type.