After specifying the part to move, you will see direction arrows and planes through which you can move the part. The original point you clicked is indicated by a large blue dot to let you track back to the starting point. The moving point is indicated by a small yellow dot. As soon as the cursor moves over the original position, the large blue dot changes to a large yellow dot. When you start dragging, the blue directional lines turn to yellow to indicate that the part has moved from its original position.