You can create a circle in the NX sketch by using the “Circle” command on the “Home Ribbon Bar” in NX Sketch Environment. The figure shows the Circle icon
NX creates auto dimensions when you start to create circles by typing a diameter size at the first circle in the sketch. You can create auto constraints instead
In the sketch application, you can align the circle center after drawing the circle freely. To align the circle center by dragging: Select the circle center