Translations:KMail/FAQs Hints and Tips/36/en
In later versions that don't have those icons you can make the changes by right-clicking on the Message List headers, and selecting Again, you need to work with the header of each column.
In later versions that don't have those icons you can make the changes by right-clicking on the Message List headers, and selecting Theme -> Configure -> Appearance Tab Again, you need to work with the header of each column.