You can sort the data in the columns of the event list in ascending or descending order, and apply secondary sorting to columns.
To sort all events by that column in ascending order, click the column header. To clear the sorting on that column, click the column header again.
To set a column to be sorted in descending order:
Any column being used in a sort is marked with a plus (+) or minus (-) symbol. Plus indicates ascending order; and minus indicates descending order. The sorting created is temporary and is not retained in the saved view.
To make a column a secondary sort, click the column header of that column after sorting the first column. For example, if you click the column header for Severity, followed by the column header for Node, the event list is sorted by ascending severity and then ascending node name.