[priceless]

You can definitely do something that might work for you with OG (I use pro, so forgive me if this isn't all in the regular version). You can create a top level flow and then on different canvases (not layers) create the sub flows.

To create links between the, select a box on your main flow and then in the inspector go to: Properties:Action

And there you can select an action based on what is most appropriate -- I typically use "Switch to Specific Canvas" and then select the canvas where the detailed flows are. This then allows you to run the presentation (in Pro) and jump around interactively and also works on an exported PDF file. There are other options there which might help you as well.

Putting an object that is "Back to main" that links back to the master canvas in a shared layer allows all pages to jump back to the high level flow.

Hope that Helps

Morgan