Viewing actions by context
When you're at the office and ready to get some work done, you probably don't care to see actions that require you to be at the store, at home, or at your cottage in Wisconsin. So it's useful to selectively view just the actions that fit your context right now.
To view the actions assigned to a particular context:
Make sure you are in context mode; the view switcher in the toolbar should have the Context icon highlighted: 
In the sidebar, click the context you are interested in. As you select it, only actions assigned to that context appear in the main outline.
If you like, Command- or Shift-click other contexts to select them at the same time.
When you find yourself using a certain set of contexts, focus, and view bar filters pretty often, you might want to save them as a perspective.
To see everything in the main outline again, deselect all contexts by clicking in an empty area of the sidebar or by Command-clicking all of the selected contexts.