From FreeCAD Documentation
- Norm. : If one circle is selected Norm not modify the radius of circle (Default)
- AdpRa : If the buttom is pressed, the spring is adapted to the detected radius (If a radius is detected )
- PMous : If the clic mouse is on one face the spring is createt on this point (Default)
- CFace : If the buttom is pressed, the spring is created on the center face selected
- Position : If twoo object are selected (first axis, second spring), this checkBox is enabled and you can modify the placement object 2 (spring) along the on object 1 (axis)
- Circle : If three points click mouse are selected the Circle button is enabled and it possible to create a circle which can serve as a base for a spring
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