After completing an exam I use to scrutinize my cards and look for those worthy of being repeated. In this way I can keep having an idea of the most important concepts of the course I have passed. To do so, I copy those selected cards in a different deck; in this way I can preserve the integrity of the deck specific of that exam.
I am aware of the "duplicate" option, however it is available for only one card at a time, a tiring procedure if there are many selected cards.
Any idea on how I could manage this?