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.