The "Ultrasound" tools are only relevant when working with Ultrasound windows.
They include:
This tool is used to control the color of the ultrasound window background.
This tool is used to control the lightning of the ultrasound geometries.
This tool is used to display ultrasound graphic objects such as axis systems or bounding boxes around the geometries..
This tool is used to modify the "transformation Matrix". It enables you to position a camera and manipulate the ultrasound objects with the mouse.