I am working on trail head modules for case feed. As part of the module, the last unit is to add the feed view to the case page layout.
When i am trying to edit the page layout of case, i find that the feed view is not available in the page layout section. I had checked all the settings and the necessary user permissions are there and i have logged in my developer instance as a system administrator.
My developer instance was created in 2012 and the case feed was introduced much later. Not sure if this is the reason for the issue. Any idea why the feed view is not enabled in my developer edition and what settings i am missing.