How can I see both Epics and Portfolio Epics in a JIRA Program schedule view for 2 different project

[Annemarie.roszkowski]

HI - 

I have 2 projects, Project A setup with Epics and Project B setup with portfolio epics. 

I am want the gantt chart view of BOTH projects start and end date. How to I get this view? 

Currently, it's making me toggle between the 2 projects in the schedule screen because they are two different types (epic, portfolio epic).

Thank you