The .idf file contains the location of the components
in the circuit board assembly.
You can also use a library and/or a catalog to get a
better geometry of the components:
- the .lib file contains the 2D footprint geometry of the
- the .catalog contains the 3D (exact) geometry of the
However, none of these two files are mandatory.
You can choose between several alternatives:
open a library only: the 3D geometry is extruded
from the 2D geometry
open a library and use a catalog: refer to
Import with Catalog
open no library and no catalog, the component has
no associated geometry.