To add a workstream to any team you manage or co-manage, hover over the Boards icon in the top menu and click Add workstream.
Name your workstream, then give it a purpose. It's a good practice to let everyone know the scope and reason why you're creating the workstream. Select a team or multiple teams to add the workstream to, then indicate whether your new workstream should include a Completion Flow Board or "Create Your Own" Board.
Once you've created a new workstream, add new action items to lay out the steps you'll need to take to complete the workstream. Read more information about how use workstreams to organize your work, here!