If you've created a multi-repo task Board, ZenHub makes it easy to create a GitHub Milestone spanning several repositories. This eliminates the need to duplicate work or sync Milestones together. To get started, find the + beside the New Issue button on the ZenHub Board.
Currently, both Milestones must be exactly the same to merge together as one. Otherwise, they'll appear separately in your reports and task Boards. That means they must have the same:
As long as the above two conditions are met, you can successfully merge Milestones before or after you connect task Boards.
Board view options give you the ability to fully customize what you want to see on Issue cards.
You can hide labels, Estimates, Milestones, Epic information, and Dependencies on Issue cards. This allows you to remove information that might not be immediately relevant to you in order to maximize the number of Issues shown on the screen.
New Board filters for labels allow you to see what Issues haven't yet been labeled. Using the filter for Issues with no labels teams can easily understand what work still needs to be categorized on the Board. This is helpful when planning, or organizing sprints to assign work and triage accordingly.
The handy Repo Switcher allows you to filter and switch repositories instantly. Click the drop-down or press f to toggle between repositories within your organization.
Find the Move Issue button on the bottom-right corner of a GitHub Issue. By clicking this button, you can move an Issue and its comments into another repository. You'll have the option to close the Issue when it's moved, or simply to make a duplicate.