You can classify Paper into groups using Sketchbook.
To create a new Sketchbook, tap the button. Set the Sketchbook name and color. (You can change the name and color later)
You can edit the Sketchbook by tapping the button in the upper right corner of the Sketchbook list or Sketchbook screen.
Pull down the Sketchbook header or contents area to return to the Sketchbook list screen.