Begin by clicking "Lefts." This will automatically rotate the scanned image 90 degrees counter-clockwise. Turn the page of the book you are scanning and continue scanning all the left sided pages of the book.
After you have scanned all of the left pages, click on the thumbnail for the first place holder at the beginning of the object. Then click .
Clicking "Rights" will automatically rotate the scanned image 90 degrees clockwise. The scanned image will replace the place holder that was created when its corresponding left page was scanned. Turn the page and continue scanning all the right pages of the book.