STARTUP (System Variable) 0 =Open with Argument file template

0	Starts a drawing without defined settings.
1	Displays the Startup or the Create New Drawing dialog box.
2	The Start tab is displayed. If available in the application, a custom dialog box is displayed.
3	The Start tab is displayed and the ribbon is pre-loaded when you open or create a new drawing.

StartMode - Turn off the start tab

Type:	Integer
Saved in:	Registry
Initial value:	1

Value	Description
0	Closes the Start tab and it will be disabled the next time you launch the application.
1	Start tab is enabled and displayed.

Note: When changing the value of STARTMODE from 0 to 1, you must restart AutoCAD for the Start tab to be displayed. If you are running AutoCAD in a single document mode (SDI =1), the Start tab will be displayed after you change the value of SDI to 0 and restart AutoCAD.