16. The system of claim 14 , the compose window further including an interpolation control by which a user identifies a content asset for interpolation that appears in a first and second non-consecutive visual displays with the content asset for interpolation having different modifications for the first and second visual displays and results in the modifications for the content asset for interpolation to be defined in the presentation instructions for the visual display occurring sequentially between the first and second visual displays according to a combination of the different modifications for the identified content assets.
16. The system of claim 14 , the compose window further including an interpolation control by which a user identifies a content asset for interpolation that appears in a first and second non-consecutive visual displays with the content asset for interpolation having different modifications for the first and second visual displays and results in the modifications for the content asset for interpolation to be defined in the presentation instructions for the visual display occurring sequentially between the first and second visual displays according to a combination of the different modifications for the identified content assets. 17. The system of claim 16 wherein the modifications include one or more chosen from the group consisting of: horizontal scaling, vertical scaling, color, transparency, and rotation.