The rows on the table can be sorted according to the content of the columns. First of all, define the fields to use as a sorting key.
First key, Second key, Third key
There are three areas where the keys can be input and each one contains a list of columns names from the current table. Choose how to sort each key. If the columns only contain numbers, then choose the Number option.
Sort selected rows only
This option is only available when rows have been pre-selected. If activated, only the selected rows will be sorted.