NX, creates auto-dimensions when creating curves in the sketch by the default settings. These dimensions are passive dimensions. You can move curves by dragging curves or changing these dimensions in the sketch. Also, you might have performance problems in the complex sketches because of created auto dimensions.
To deactivate these auto-created dimensions in the sketch; change the setting of the “Continuous Auto Dimensioning in Design Application” in the “Customer Defaults”.
Customer Defaults => Sketch => Inferred Constraints and Dimensions => Dimensions => Continuous Auto Dimensioning in Design Application (deselect this option)
