We have one project for Epics and some other projects for Stories. We are linking these Epics and Stories via "Epic Link". We have created a Board to see them in a single view. However, in Epic Burndown chart, after selecting the Epic, we just would like to see the sprints of linked projects. For example, Project A (located Epics) has link with two stories from Project B (Stories). But when we open the Epic Burndown chart, we also see the sprints from other projects but would like to see just the sprints in Project B. I don't know if i'm clear or not but please help me if you have an opinion.