A system providing a user interface to allow a user to easily modify parameters
of media presentations such as images and audio. The user selects first and second
reference instances, such as images. The images are described by parameters and
parameter values. Differences between the images' parameter/value characteristics
are identified. The first and second reference images are placed at different points
on a display screen. By moving a pointer relative to the positions of the first
and second reference images, a current image is generated that is a combination,
or function, of the identified parameter/value characteristics. Thus, the user
is able to quickly, and intuitively, achieve many desired modifications to the
media. A feature of the invention allows image content to be modified in a similar
manner. First and second computer model positions, animations, bitmap images, etc.,
can be used and the same technique employed to create many derivations from the
selected reference images. Multiple parameters can be changed concurrently. A user
can be presented with a list of parameters so that the user can selectively enable
or disable parameters to be changed.
