The Color flow (Color Doppler) mode is adding color coded qualitative information concerning the relative velocity (in m/s) and direction of fluid motion within the black and white (B-mode) image.
1. Press the Color icon.
A color flow area displays on top of the black and white image.
Entering Color flow
2. Drag the color Region of Interest (ROI) to the desired area. The color ROI outline becomes blue when active.
3. To exit color and return to B-mode press the 
icon.
Disclaimer: The information herein is not intended to replace the product’s User Manual. Please consult the User Manual for comprehensive information and cautionary guidance about the product’s operation and use.