A system (800) includes an acquisition engine (837) that acquires ultrasound data for two or more modes with a first acquisition algorithm, including an image mode and a special mode. A rendering engine (834) employs a first rendering algorithm and displays the image in a main display window (902) and the special mode ultrasound data in a viewport (906) superimposed over the main display window. The acquisition engine acquires ultrasound data for the special mode using a second acquisition algorithm and the rendering engine displays a first portion of the generated special mode ultrasound data over the main display window and a second portion of the generated special mode ultrasound data over the viewport using a second rendering algorithm in response to the system receiving an input signal indicative of a movement of the viewport from a first location of the main display window to a second different position of the main display window.