1. A guidance display method of causing a display unit operatively coupled to a turret provided with a plurality of grips, each grip capable of holding a tool to display instructions for an angular position adjustment method for adjusting a predetermined angular position of the turret so that the predetermined angular position becomes an origin, comprising:providing a processor programmed to cause the display unit to display the following steps:
displaying a first step on the display unit to instruct an operator to move a spindle up and down near a position at which the tool is transferred between a predetermined grip of the plurality of grips and the spindle and to observe runout of a tool tip, and
when the operator confirms that runout of the tool tip is observed by operating a button on the display unit,
automatically displaying a second step on the display unit to instruct the operator to raise the spindle up to a turret rotatable position where the turret rotates while the tool attached to the turret does not interfere with the spindle; and
displaying a third step on the display unit, after the operator has raised the spindle up according to the second step, to instruct the operator to turn the turret so as to reduce the runout of the tool tip.