Arbortext IsoDraw > Macro Language Reference > Object Data Types > Document Object > activeDoc > activeDoc.active_set
  
activeDoc.active_set
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In Arbortext IsoDraw 7.2, the term “3D set” replaced the term “3D session.” In addition, the keyword active_set replaced the keyword active_session. You can use either keyword, however, for Arbortext IsoDraw 7.2 and later, activeDoc.active_session is deprecated.
In Arbortext IsoDraw only one 3D set can be active at once. When a 3D set is active, its 3D coordinate system is visible and you can edit the 3D objects it contains.
With activeDoc.active_set, you can access the top 3D group element in the 3D set. However, active_set is of type ELEMENT and cannot be set directly. (To make other 3D sets active, use the macro commands TRANSFORM 3D and PROJECT.)