Arbortext IsoDraw > User's Reference > Menus > Element Menu > Advanced Tools > Shaft Tool > Starting the Drawing
  
Starting the Drawing
You have chosen Element > Advanced tools > Shaft tool. The cursor changes into a Drawingcursor. Drag an ellipse. This ellipse is the starting element for your drawing.
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Since the angle and the size of the ellipse cannot be changed subsequently, make sure you consider the orientation of the drawing and which diameter the shaft is to start with.
You will now see an ellipse on the drawing sheet with three dragging points. The outer points are used to change the diameter. By dragging the dragging point in the center, you can give the segment depth.