A touch-sensitive device for use as an electronic input device for
controlling by scrolling the visible portion of a document or image
relative to a display. The device can include various improved
configurations such as physically separate opposed input surfaces at
opposite longitudinal ends and/or lateral sides. The end regions of a
touch sensitive surface may be rounded and/or tapered to provide relative
positional feedback to the user. Tactile positional feedback can also
include surface texture changes on the scrolling area and/or changes in
the surface of the frame in the region immediately adjacent the scrolling
area. The touch sensitive areas may be provided within a split
alphanumeric section of an ergonomic keyboard to enable scrolling without
the user having to remove his or her hands from the alphanumeric section.