Brentwood1978

I posted my HOME DESIGNER PRO 2017 above the screen shot. I want to use 2"x6" lumber to make my vaulted ceiling. I am wondering how can i add them to the screen shot i posted?

Sorry, new to this. I am using Home Designer Pro 2017

I am designing a living quarters in 1/2 of a metal post frame building, customer wants a vaulted ceiling from the 8' side walls to the bottom of the rafters that is 13' . i have figured out how to put a beam up but can't figure out how to put in 2x6 vaulted ceiling board from my side walls to the rafter beam in the center of the room. can someone walk me thru this? Brentwood1978