Openings tab in model data under External Glazing headers
To include overhangs, sidefins and/or louvres check the Local shading checkbox. This shows the Local shading component data. DesignBuilder comes with a small database of Local shading devices, but if you cannot find a suitable component for your model, you can create a custom local shading component. by clicking on the Add new button from the Selection dialog or from the info panel when using Learning mode.
See also the Shading via louvres, overhangs, and side fins tutorials
Note: the DesignBuilder Local shading devices allow a range of different overhangs, side fins and louvres to be defined, but if you need to model a shading device not covered by the standard mechanism, you can draw custom shading devices using Component blocks or Assembly blocks.