Opens an existing drawing file.
The Select File dialog box (a standard file selection dialog box) is displayed.
When FILEDIA is set to 0 (zero), OPEN displays a Command prompt.
You can open and load a portion of a drawing, including geometry on a specific view or layer. In the Select File dialog box, click the arrow next to Open and choose Partial Open or Partial Open Read-Only to display the Partial Open dialog box. (Not applicable to AutoCAD LT.)