A training list is created like a collection using the + button and can be used to learn a specific vocabulary, e.g. for tests or exams.
Flashcards from different collections can be stored in a training list.
To do this, select the three dots on an expanded flashcard and choose "Add to training list". Then select the training list to which you want to add the flashcard.
A copy of the flashcard is added to the training list. The flashcard itself remains in the collection. If you delete a training list, the flashcards are not deleted from the collection.