Click> , then click . For Macintosh, click > , then click .
Select the number of days to keep recent messages.
This clears all messages up to the number of days selected. You can only clear history up to one day old.
To totally clear your history, you need to delete the history files. To determine where you history files are stored, click> , then click . For Macintosh, click > , then click . The history files location is stored in the field.
You can change the history file location. For more information about moving the history file, see Section 8.18, Changing the History Files Location.