Baseline height-where to set?

[Stefan]

Where is baseline height for roofs set? 

[Alaskan_Son]

Depends on how you draw the roof.  Auto-built, they are set according the the room ceiling height in conjunction with the rafter or truss top chord settings.  Manually built then it depends on where you start dragging out your roof plane:

-Over a wall:  Uses ceiling height along with rafter or top chord.

-Over another roof plane:  Uses height of existing roof at that point.

-Over nothing:  Uses default ceiling height as set for the current floor along with rafter or top chord settings.

[JJohnson]

It is built automatically which depends on lots of variables, but

you can then change it in the Roof Plane Specification dialogue box.