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The patent appears to take a page from Jobs' keynote speech in January, pointing out the inherent need for a flexible touchscreen interface. Since the keys and screen on traditional cell phones are fixed in place, the interface can rarely change to accommodate new features; developers often have to add physical buttons or overload existing buttons with special features, the patent explains. In return, users often can't change the interface themselves to fit their own expectations, typically forcing them to memorize obscure commands.

Apple's solution would rely heavily -- but not necessarily -- on a touchscreen interface virtually identical to that of the iPhone. By dragging an on-screen icon with a finger or stylus, users could either move icons to a static tray on the screen, replacing an earlier icon, or shift them around in their existing sections. In that latter case, neighboring icons could move aside gracefully to reorder the interface on the fly and make it clear where an icon will land when the user lifts their pointing device.