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.
Note: If you have repeated windows having same size, glazing type and window shading on a surface but different Local shading settings, you should switch off the Lump similar windows on surface model option. This is because the window lumping mechanism does not account for local shading and so windows may be lumped inappropriately in this case.
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.