Soft keys in Fanuc refer to customizable function keys on the CNC (Computer Numerical Control) machine's display. Soft keys are displayed on the screen and can be programmed by the operator to perform various functions or execute certain commands. These keys are designed to improve efficiency and productivity by providing quick access to frequently used functions or commands.The specific functions assigned to soft keys on a Fanuc CNC machine can vary depending on the particular application or user preferences. For example, an operator may program a soft key to set a specific tool, adjust the speed of the spindle, or activate a coolant system. Soft keys can also be used to execute macros or perform other custom operations.