I am new to autobid mechanical. On my drawing I have a vertical riser with a drain leg at the bottom. The drain leg has a reducer, nipple, valve and plug. How can i tell autobid that all of these items are in the vertical plane. When i hit branch from and the riser i click on bottom of riser. autobid wants me to draw a direction for the run of pipe but there is none. Everything is vertical. What can I do?