Studies includes a few built-in stacks which get updated automatically. These include…

Title	Contents
All Notes	All of the notes in the Library.
Due for Study	The notes that are due to be studied.
Flagged	All notes that have been flagged.
Recently Incorrect	Notes that were graded wrong when last studied.
Loose Notes	Notes that do not belong to any of your stacks.
Trash	Notes that have been moved to the Trash.