The Book Learning menu

Learn Game
Tell WZebra to learn the current game using the below settings. Only finished games starting from the initial position can be learned. WZebra will spend some time - how much depends on the settings - analyzing all positions in the game and afterwards add it to the opening book. Telling WZebra to learn bad games (e.g. beginner games) will not hurt the opening book as all positions are analyzed.

Negamax book
In some cases where transpositions are introduced when a game is added to the opening book, some old positions will contain scores which are not in sync with the scores from the new positions. This function will cause WZebra to go through all positions in the book and remove inconstistencies.

Set learning parameters
Opens a dialog window in which you are asked to set the following parameters: