Activates all drawing views, parts lists, and model-derived tables in the draft document as though the document was opened in normal edit mode. In active mode, objects are checked to determine whether they are out-of-date. Model geometry in drawing views is live and accessible.
While the draft document is open, you can use this command to change the status of a draft document from review (for fast-open viewing and printing) to active (for editing).
Active mode is the default open mode for draft documents.
Note:
You also can set a preference to open a draft document in active mode by setting the Activate Drawing Views For Edit option in the Open File dialog box and then clicking the Save As Default button.