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From SofTutor for AutoCAD 3D - Moving 3D Walls To Create A Staircase
Topics covered in this video are:

Moving 3D Walls To Create A Staircase
ID Command
Tip On Drawing Lines In 3D
Repositioning Wall In 3D After Making An Error
Moving Object In 3D
XYZ UCS Demo
Previous Last XYZ 3D Demo
Values XYZ Plane
UCS View Rotate Demo
XYZ Plane OSnaps Demo