The last time I was working on the duct line thickness was about a year ago. And I didn't realize lwdisplay was off. So It is shows when I change the line scale through autocad. Thanks for the reminder. I was hoping to set it up in Fab cadmep so I wouldn't have to set it up every job. I tried to set it up in takeoff/services/cad types. But the max width it can be set to is .083 inches.