When Rebel makes a move it will at the same time evaluate the preceding move. If Rebel strongly disagrees with the move (you) played Rebel will mark this move with an annotation symbol if this option is switched on.
In this way Rebel automatically will annotate your moves while playing your games against Rebel. As a result you immediately will see if you make a mistake. Used symbols are:
Keep in mind the quality of these automatic annotations is subject to the playing strength you have set Rebel and the time level you play your games. For the best results make sure Rebel is set to its strongest settings. And of course the quality of the annotation raises the higher time level you use.
Annotations are kept in the database in case you save the game.