Abstract: In a computer-implemented method, a portion of an electronic document is displayed on a touch screen display of a portable multifunction device. The displayed portion has a vertical position and a horizontal position in the electronic document. An object is detected on or near the displayed portion of the electronic document. In response to detecting the object, a vertical bar and a horizontal bar are displayed on top of the displayed portion. The vertical bar has a vertical position on top of the displayed portion that corresponds to the vertical position in the electronic document of the displayed portion. The horizontal bar has a horizontal position on top of the displayed portion that corresponds to the horizontal position in the electronic document of the displayed portion. After a predetermined condition is met, display of the vertical bar and of the horizontal bar is ceased.

Abstract: A computer-implemented method for use in conjunction with a computing device with a touch screen display comprises: detecting one or more finger contacts with the touch screen display, applying one or more heuristics to the one or more finger contacts to determine a command for the device, and processing the command. The one or more heuristics comprise: a heuristic for determining that the one or more finger contacts correspond to a one-dimensional vertical screen scrolling command, a heuristic for determining that the one or more finger contacts correspond to a two-dimensional screen translation command, and a heuristic for determining that the one or more finger contacts correspond to a command to transition from displaying a respective item in a set of items to displaying a next item in the set of items.

Abstract: The embedding of parts within one another, and synchronization of their various views, is implemented by means of a data structure consisting of two major components. One component, a display list, comprises a list of frames, or other container structures, in which a part of interest is displayed. The second component of the data structure is a proxy run, run identifies each part that is embedded in the part of interest. Together, these two data components define a matrix structure, in which there is a row for each embedded frame in a part, and a column for each frame within which the part is displayed, or vice versa. This structure provides a mechanism to keep the size and shape of corresponding embedded frames, which are displayed in different views, synchronized with one another.