[whpalmer4]

Whether the underlying view is organized by project or by context. On the Mac, if you see the names of projects in the sidebar, it's a project mode perspective, and if you see the names of contexts in the sidebar, it's a context mode perspective. Context mode views are flat lists of actions, with no hierarchical structure. The Flagged view on the iPad is a good example. Project mode views can have considerable structure, and the iPad and iPhone apps don't support them yet, except for built-in views.