Brief Examples of OmniFocus Perspectives
The “Changed” perspective is the best kind of “undo” screen. If I accidentally mark a task or project as complete or if I mistakenly changed something that removes the task from my view I go to this perspective to fix it. It shows everything in my OmniFocus sorted by modification date.
With enough perspective trickery I even create project outlines that are otherwise not possible in OmniFocus. It’s the double negative in this perspective which removes all of the tasks from the view and leaves me only with the nested projects and folders to browse.