Mage is a 3D vector display program which shows "kinemage" graphics. Used in both teaching and research, in applications ranging from estuary ecology to X-ray crystallography model quality assessments, Mage displays the 3D relationships between data in an interactive environment which facilitates both open-ended exploration and structured presentation. It includes many tools for on-screen measurement, construction, and editing of the display objects; it can write either kinemage output or various types of 2D image output.