During stacking Nebulb performs the detection of flying objects and also automatically classifies them among: meteors, strangers, satellites/planes and ghosts.

This initial sorting done by Nebulb greatly facilitates the user's subsequent visual review, where it is common for the user to modify the category of various flying objects (either manually or by automatic classification according to the radiant).

Thus, there may be situations where the user has made too many changes and wants to return to the initial classification. For this purpose Nebulb has an option to reset the initial classification of flying objects (in the menu "Flying Objects -> Restore default sorting").