To Add a New Mullion Assignment to a Door and Window Assembly Style

1. Click Manage tab Style & Display panel Style Manager .
2. Expand Architectural Objects Door/Window Assembly Styles.
   Note: Alternatively, select a door/window assembly in the drawing, and click Door/Window Assembly tab General panel Edit Style drop-down Door/Window Assembly Styles.
3. Select a door/window assembly style.
4. Click the Design Rules tab.
5. In the left pane, select the grid in which you want to create a new mullion assignment.
6. Click (new mullion assignment).

   A new mullion assignment is displayed in the list of mullion assignments.

   

7. Right-click the default name, click Rename, and then enter a descriptive name.
8. Under Element, select a mullion definition.
9. Specify the mullions to use this assignment.
10. Click OK.