This documentation is now out of date - it applies to Coaster CMS v 5.2 and before. Group pages can now be created through the admin.
There is a group system in development where you can group pages by block content, it includes a
It's currently in development but usable via few database edits.
There should then be a group icon appear on the top level page in the back-end from which you should be able to add posts. Once you start adding to pages to the group, they will all appear in the group page list with the post type visible in the list. More blocks can be added to the list by adding another group attribute if needed.
There is also a filter function, so multiple top level pages can be set up but filtered by different values based on the group_attribute tables filter_by_block_id field and the group container pages block value.
Based on Laravel 5.4
Additional features always being planned/researched