missing documentation

[Volker Wysk]

Hello!

When trying to open the documentation of KMail (press F1), I get the message 
"Documentation not Found". From timet to time I also get a notification of 
something like "Documentation not installed. It is in a separate package" (or 
simething like that). Sadly, it doesn't say which package that would be.

How do I install the full documentation, or rather, how is it organized into 
packages in Kubuntu? I couldn't find a package named "kmail-doc" or similar, 
although I have installed "kdepim-doc" - which doesn't seem to contain the 
KMail docu.

The KMail version is 5.0.2.

Thanks,
Volker