9. A computer-implemented method, comprising: at a device with a touch screen display: displaying an electronic document at a first magnification on the touch screen display; detecting a gesture on the touch screen display corresponding to a command to zoom out by a user-specified amount; displaying the electronic document at a magnification less than the first magnification on the touch screen display, in response to detecting the gesture; displaying the electronic document at a magnification wherein areas beyond opposite edges of the electronic document are displayed on the touch screen display, if a document length or a document width is entirely displayed while the gesture is still detected on the touch screen display; and in response to detecting termination of the gesture, displaying the electronic document at a magnification wherein the areas beyond opposite edges of the electronic document are no longer displayed on the touch screen display.
9. A computer-implemented method, comprising: at a device with a touch screen display: displaying an electronic document at a first magnification on the touch screen display; detecting a gesture on the touch screen display corresponding to a command to zoom out by a user-specified amount; displaying the electronic document at a magnification less than the first magnification on the touch screen display, in response to detecting the gesture; displaying the electronic document at a magnification wherein areas beyond opposite edges of the electronic document are displayed on the touch screen display, if a document length or a document width is entirely displayed while the gesture is still detected on the touch screen display; and in response to detecting termination of the gesture, displaying the electronic document at a magnification wherein the areas beyond opposite edges of the electronic document are no longer displayed on the touch screen display. 13. The computer-implemented method of claim 9 , wherein the areas beyond opposite edges of the electronic document include an area beyond a right edge of the document and an area beyond a left edge of the document.