I don't quite understand how backlog prioritization works in Portfolio. Let's say I have stories 1, 2 and 3 in epic ABC, stories 4 and 5 in epic DEF and story 6 in epic GHI.
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Is there a way to prioritize stories across epics? Let's say, I want to prioritize my stories in the following order: story 1, 2, 4, 5, 6, 3? Seems like a pretty basic functionality, yet I can't figure out a way to do it.