31. A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by an electronic device with a touch screen display, cause the device to: display at least a portion of a structured electronic document on the touch screen display, wherein the structured electronic document comprises a plurality of boxes of content and the displayed portion includes at least a first box of content and a second box of content, the first box of content being displayed at a location on the touch screen display that is separate from a location of the second box of content; detect a first gesture at a location on the displayed portion of the structured electronic document; and in response to detecting the first gesture: in accordance with the first gesture being located at the first box of content in the plurality of boxes of content, enlarge and translate the structured electronic document so that the first box of content is displayed on the touch screen display and the second box of content is not displayed on the touch screen display; in accordance with the first gesture being located at the second box of content in the plurality of boxes of content, enlarge and translate the structured electronic document so that the second box of content is displayed on the touch screen display and the first box of content is not displayed on the touch screen display.
31. A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by an electronic device with a touch screen display, cause the device to: display at least a portion of a structured electronic document on the touch screen display, wherein the structured electronic document comprises a plurality of boxes of content and the displayed portion includes at least a first box of content and a second box of content, the first box of content being displayed at a location on the touch screen display that is separate from a location of the second box of content; detect a first gesture at a location on the displayed portion of the structured electronic document; and in response to detecting the first gesture: in accordance with the first gesture being located at the first box of content in the plurality of boxes of content, enlarge and translate the structured electronic document so that the first box of content is displayed on the touch screen display and the second box of content is not displayed on the touch screen display; in accordance with the first gesture being located at the second box of content in the plurality of boxes of content, enlarge and translate the structured electronic document so that the second box of content is displayed on the touch screen display and the first box of content is not displayed on the touch screen display. 39. The non-transitory computer readable storage medium of claim 31 , wherein the first gesture is a double tap gesture.