Tooltip Fields -- The output contents of XYZ in the tape file for multi-axis machines can be tool-tip or offset by tool length and pivot point. Default option, is tool-tip meaning XYZ are adjusted by programmed tool length and any offset distance. Gantry option, is for 5-axes head/head machines tools that support the tool-tip XYZ output. The controller at your machine tool will adjust for tool length and pivot distance. Other option, gives you a choice to select only the tool length or pivot distance adjustment or output input part coordinates for XYZ as supported by your machine tool.