[whpalmer4]

Well, if you really want a copy of the flagged view that only shows unflagged actions, rather than flagged actions, that's easy. Open the flagged view. Choose View->Status->Unflagged. Now do Perspectives->Save Window As->New Perspective and choose a suitable name for your new perspective.

If you didn't say quite what you meant, and instead wanted a copy of the flagged view that shows both flagged and unflagged items, the instructions are the same, except you choose View->Status->Any Status.

If you turn on the View Bar via View->Show View Bar, you'll see the Availability filter Lizard referred to in her post.

What I would probably do is use a context mode view, grouped by due date, closing all the groups except those for due today (or earlier), and showing available actions. This will show you only items that have a due date of today (or earlier) which are available (no start date set, or a start date which has passed). Save as a perspective with the Restore Expansion box checked so that it opens/closes the groups to match what you had. If you don't put start dates on everything, and want the items without a start date to be hidden from that view, just close the No Start Date group before saving the perspective.