To Insert a Fixed Number of Doors or Windows Evenly on a Grid Line Segment
Select the wall on which you want to insert doors or windows.
Click one of these commands:
Click Wall tabGeneral PanelDoor drop-downEvenly between Grid Lines.
Click Wall tabGeneral PanelWindow drop-downEvenly between Grid Lines.
Select a wall segment between two grid lines by clicking the segment onscreen. The red line serves as a preview.
Verify that the Multiple Insert option on the Properties palette is set to Yes.
Enter the desired number of doors or windows under Number to Insert.
By default the command assumes that the user wants to insert doors or windows at an evenly spaced distance, and suggests a range of the minimum and maximum possible doors or windows that can be fit on the selected wall segment.
Verify that the Position Multiple option is set to Evenly.