An improved application sharing system and method are described wherein an application sharing viewing display is modified to increase the likelihood that a viewing user is able to see without scrolling the entirety of a window of interest displayed by a sharing user on a sharing machine. The scale of the viewer representation of the window of interest may be substantially continuously varied so as to best account for the particular size of the available display area at the viewing machine. In a further embodiment of the invention, the viewer's attention may be focused by filtering of the shared display material to visually enhance the current window of interest.