To Add a Main Task
- In the Customize dialog ( File > Settings > Configuration > Customize ) on the Tools tab, expand the Main Tasks tab.
-
Expand the User Tasks section.

-
Expand the open DGN library.

-
Do one of the following:
- Select the open DGN library and click the New Task icon.
- Right-click the open DGN library and select New Task from the pop-up menu.
- Click and drag a custom toolbox from the left pane to the open DGN file.
A new Main task appears with the name “New Task”, except when a toolbox is dragged from the left pane, in which case the new Main task has the same name as the toolbox.

- Right-click the Main task, select Rename from the pop-up menu, and type a new name.
- Click and drag tools from a DGN library or from the Application Tools in the left pane to the Main task on the Main Tasks tab.