Hello,

It is possible to create a blog post under a page menu item, but you will need to allow blog post as a child document type for a page menu item, so please go to the Site Manager -> Development -> Document types -> (edit) Page (menu item) -> Child types (tab) and here you can add a Blog post as a child document type for Page menu item. So if you have - for example - a Test menu item under your root master page and you create a child blog post for it, the repeater's properties should look like the following ones:

Path: /Test/%
Document types: CMS.BlogPost
Maximum nesting level: -1
Transformation: CMS.BlogPost.Default

Please don't forget, that when you create a blog post, appropriate blog month is also created, so if you want to change this behavior, the easiest way is create a new custom document type, which will contain same fields as the blog post document type does.

Best regards,
Jan Hermann