brogol

When you add a post, you can add this post to an index in the right column (with defaults settings).
If you have no index, you have to add this index in the field “New index” in the right column. If you name your index “tchoupi” then you put this code in the page you want to see all the posts of this index :
[index=tchoupi]

For the category, it’s just the id, like [index=3].

Sorry for the slow answer.