How to save a session manually?

Wolfgang Mueller <[email protected]> Thu, 28 Nov 2019 12:47:24 +0100

Newsgroups	gmane.comp.kde.linux
Organization	Ariannuccia
Message-ID	<[email protected]>

By invoking "Configure Desktop" and selecting
"Startup and Shutdown" -> "Desktop Session" -> "On Login",

the following list of options is displayed:

    o Restore previous session
    o Restore manually saved session
    o Start with an empty session

Having selected "Restore manually saved session", I do not know how 
to save a session manually. Can somebody help me?

Thank you in advance and best regards,
Wolfgang