A control apparatus for a machine tool that machines a workpiece by moving a tool relative to the workpiece, comprising: a display part that displays information relating to the machine tool; a display control part that controls display on the display part; and a storage part that stores display settings of the display part, wherein the display settings of the display part corresponding to an operation of an operator or state of the machine tool are stored in advance in the storage part; and the display control part obtains the operation of the operator or the state of the machine tool, reads the display setting corresponding to the operation of the operator or the state of the machine tool from the storage part, and changes the display on the display part on the basis of the display setting, wherein an operation mode for driving the machine tool is set in advance, and when an operator switches the operation mode, the display control part reads the display setting corresponding to the operation mode from the storage part, and changes the display on the display part on the basis of the display setting, characterized in that the operation mode includes a manual trial operation mode for manually driving the machine tool, and when the operator switches the operation mode from other than the manual trial operation mode to the manual trial operation mode, the display control part changes the display on the display part to a manual operation screen for manually driving the machine tool, and wherein the control apparatus further comprises a manual pulse generator that transmits a pulse signal for manually driving the machine tool, wherein the manual pulse generator includes a permission button that enables the pulse signal to be transmitted while being pressed, and in a state in which the manual selection mode is selected, when the operator presses the permission button during a period when a screen other than the manual operation screen is displayed on the display part, the display control part changes the display on the display part to the manual operation screen. a display part that displays information relating to the machine tool; a display control part that controls display on the display part; and a storage part that stores display settings of the display part, wherein the display settings of the display part corresponding to an operation of an operator or state of the machine tool are stored in advance in the storage part; and the display control part obtains the operation of the operator or the state of the machine tool, reads the display setting corresponding to the operation of the operator or the state of the machine tool from the storage part, and changes the display on the display part on the basis of the display setting, wherein an operation mode for driving the machine tool is set in advance, and when an operator switches the operation mode, the display control part reads the display setting corresponding to the operation mode from the storage part, and changes the display on the display part on the basis of the display setting, characterized in that the operation mode includes a manual trial operation mode for manually driving the machine tool, and when the operator switches the operation mode from other than the manual trial operation mode to the manual trial operation mode, the display control part changes the display on the display part to a manual operation screen for manually driving the machine tool, and wherein the control apparatus further comprises a manual pulse generator that transmits a pulse signal for manually driving the machine tool, wherein the manual pulse generator includes a permission button that enables the pulse signal to be transmitted while being pressed, and in a state in which the manual selection mode is selected, when the operator presses the permission button during a period when a screen other than the manual operation screen is displayed on the display part, the display control part changes the display on the display part to the manual operation screen.