Multiple _post directories

[inaheaven]

Hi, before asking you a question, I would like to say thank you very much for your work with this jekyll theme.

I want to create additional post-like directory, but separate them from the original post and have own menu link.
While googling for such issue, collection is often suggested, but did not work at my first attempt.
I wish to know if it is me or the jekyll halve don't work along with the collection.
Also, if you have any idea with this regard, please share.

Again, thank you very much.