typedef struct {
  // Axis settings
  float steps_per_mm[N_AXIS];
  float max_rate[N_AXIS];
  float acceleration[N_AXIS];
  float max_travel[N_AXIS];
  float current[N_AXIS];

  // Remaining Grbl settings
  uint8_t pulse_microseconds;
  uint8_t step_invert_mask;
  uint8_t dir_invert_mask;
  uint8_t stepper_idle_lock_time; // If max value 255, steppers do not disable.
  uint8_t status_report_mask; // Mask to indicate desired report data.
  float junction_deviation;
  float arc_tolerance;

  float spindle_pwm_freq;      // Hz
  float spindle_pwm_off_value; // Percent
  float spindle_pwm_min_value; // Percent
  float spindle_pwm_max_value; // Percent
  float rpm_max;
  float rpm_min;

  uint8_t flags;  // Contains default boolean settings

  uint8_t homing_dir_mask;
  float homing_feed_rate;
  float homing_seek_rate;
  uint16_t homing_debounce_delay;
  float homing_pulloff;
} settings_t;

  #define SHOW_EXTENDED_SETTING