Group blogs into collections - How ?

[ThomasFr42]

Ther is a new feature:
Group blogs into collections

but I found no documentation how to do that ?
Is this explained in the wiki ?

[thomas694]

I haven't had time yet to write an article about it. You can only look at the originating issue #170 and try it out yourself.

Everyone who would like to write a short tutorial on how to use the new functionality is very welcome.