When importing an FBX file, most of the settings are self-explainable, however, there are some settings that I'm curious to know the meaning/use of. These are:
(1) Import User Properties (what are user properties in an FBX file, doesn't FBX only store meshes, textures, and animations?).
(2) Import Enums As Strings (what are Enums and Strings?).
(3) Use Pre/Post Rotation (what are pre/post rotation?). Hovering the mouse over these in Blender doesn't explain them very well, and the Blender manual just says "TODO." on these (https://docs.blender.org/manual/en/2.80/addons/io_scene_fbx.html).