Patent ID: 7317449

Claim:
A key-based advanced navigation system comprising: a key-based input component which maps to one or more segments of content displayed on a portable device screen, the key-based input component comprising any number of numeric keys and non-numeric keys wherein a first key is tapped to zoom in at least a first zoom level to the corresponding segment of content and a second key is pressed and held for a period of time to temporarily display a different segment of content where upon releasing the second key the displayed content returns back to a previous segment of content to provide at least one of context and perspective with respect to the previous segment of content; a navigation component that facilitates navigating through the content in part according to the input received from the input component; and a mapping component that smoothly transitions a current view to a new or previous view and orients the content and/or the view thereof within the portable device screen based in part on data received from the input component and the navigation component.