Thumbnail Locations
By default, thumbnails are saved in the %CFE_CLIENT_HOME_%\inventor\Temp
folder. To change the folder, modify the variable value of the
PLM_THUMBNAIL_GEN_DIR environment variable.
Thumbnails for Item Configurations
Thumbnails are generated for the default configuration, that is for the originating items, when the design variants are not captured. The thumbnails are linked to the document.