It doesn’t allow you to review all your decks simultaneously, but you can merge decks by importing one deck into another. http://ichi2.net/anki/wiki/FrequentlyAskedQuestions#How_can_I_merge_or_split_decks.3F
It doesn’t allow you to review all your decks simultaneously, but you can merge decks by importing one deck into another. http://ichi2.net/anki/wiki/FrequentlyAskedQuestions#How_can_I_merge_or_split_decks.3F