In this control module you can configure KDE's session manager. This includes just two options:
If this option is checked, when logging out KDE will display a dialog asking for confirmation. In this dialog you can also choose whether you want to restore your current session when you login the next time.
If this option is checked, KDE will save your current session's state when you logout. KDE will restore your session on the next login, so you can continue to work with a desktop just like you left it.
This section written by: Jost Schenck <jost@schenck.de>