@enrique said: ........also on the user cordinate system and how it relates to the world coordinates and can i revert to a ucs or the wcs or toggle them ?.... Enrique, Say you save the default SU axes setup in Scene1 You can now translate and/or rotate the axes as an orthogonal set to a new origin/direction. Save this in Scene2 You will now be able to toggle between the two systems. Also moving objects absolutely by using [x,y,z] is related to the current UCS, not to the WCS where SU starts from. Unless it is the current one. So moving a selection by clicking on a point A to start from to [3m,5m,7m] will place point A (taking the selection with it) in x=3m,y=5m,z=7m of any rotated/translated current orthogonal system. The same applies to relative movements: <2m,7m,3.25m> A2 is relative to A1 by x=2m,y=7m,z=3.25m measured along the current axes It works in SU7 and SU6. Wo3Dan