How to add default meta-keywords/description for cms articles?

[Mooff]

Hi,

i want to add default meta keywords / meta description to all my articles on the vbcms. To be exact i want them to use the keywords/description of their section unless i use specific values in the article itself.
I know there is an option on the bottom right of every article to add them - but i do not believe our users will do that for even one percent of all articles which end up on our site. That's why we need some default values for searchengines.


I searched here and via google and haven't found anything. If it is an easy find for you please post a link instead of telling me to search for it