How does the studio screen work?

The top bar shows "Activity Studio · Coloring Books", the title, the number of designs and pages, the trim and whether the book is saved, with the buttons "New designs" and "Export" (the arrow on the left goes back to Activity Studio). The left column holds the cards: Print check, The book, The designs, Color by number, Pages, and Cover and listing text. The middle shows the real page, exactly as it prints, with a toolbar for the design shown (See it colored, Color it in, the kind of design, the round arrow for a new design, Edit, remove, lock). The right column, "Designs", shows every design of the book as a small picture, with the "Photo page" button.