How do you create a subroutine in windows workflow?

Given a working secti开发者_C百科on of Windows Workflow within the designer, I'd like to use that section from another place in the process. I want to create a subroutine.

I suspect this is so obvious, that it hurts.

I'd like to stay within the the designer. Going outside and writing vb.net or C# would work, but it involves re-writing existing code.

I'm hoping that a properly selected chunk can be manipulated/edited by some menu selection.

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Create a composite activity, a XAML file, and reuse that in multiple places on the worklfow.