A: When importing a 3D model from other CAD software, three different import modes are provided.
(1) Normal---The normal import result is 3D geometry data ( such as solids, or surfaces), which can be edited.
(2) New Quick Import --Default imported result is graphics data for viewing the model. It means that the model geometry can't be selected or edited.
But the option "Load all models" allows the user to load model geometry data. Then the result is same as the normal model. The model can be edited.
(3) New Quick View -- The imported result is graphics data for quick viewing of the model.