This document lists the parameters on the export window, and their descriptions
Export Textures: When checked, an attempt will be made to export all (readable) textures
Generate Materials: When checked, the accompanying .MTL materials library will be generated for the OBJ file
Split Objects: Do we want to split objects?
Selected Only: When checked ,only selected objects will be exported
Apply Scale: When checked, the scale of models will be taken into account on export
Apply Position: When checked, the position of models will be taken into account on export
Apply Rotation: When checked, the rotation of models will be taken into account on export
Auto Mark Tex Readable: When checked, textures will automatically be marked readable if they aren't
Obj Name Add Id Num: When checked, the objects index will get appended to the name so duplicate object names won't be combined.