Can't Create Wall Sweeps in Wall Type/ Edit Assembly Dialogue Box

[Ana_Kurzan]

Hello!

I am trying to add a wall sweep to a wall type and all the options under "Modify Vertical Structure" in the Edit Assembly Dialogue box are greyed out. See attached image. 

Any help would be greatly appreciated. 

[syman2000 · Accepted solution]

Click on preview and then select section. The button will show up.