The first click will sort the column in ascending order (A-Z or 0-9) and
the second click will re-sort the column in descending order (Z-A or
9-0). By clicking the column headers you can easily toggle the
When you click a "Alphabetic Index" character, the Last
Name column is automatically sorted in ascending order A-Z. If it
doesn't sort correctly, just click the Last Name heading until the
column is sorted in ascending order A-Z then try the "Alphabetic
Index" character again.