I have a requirement to have a scrum board for a single epic, showing all the stories and tasks in those stories.
How do I set up a filter that is "this epic and all things related to it" to create a board from?
In the Issue navigator you can Search for Issue and type "Epic Link" = "insert name of epic" and press search. After that press Save as and give it a filter name. Then Go to Agile, Manage boards, and create a new board based on a filter.