How does the studio screen work?

The left column holds the cards with the book's settings: Ready to publish, The book, The puzzles, Pages and solutions, and Cover and listing text. The middle shows the real page, exactly as it prints. The right column lists the puzzles by level. The difficulty curve is at the bottom. The top bar shows the title, the number of puzzles and pages, the trim and whether the book is saved, with the buttons "New puzzles" and "Export".