I mostly cut vinyl stickers and magnet sheets, but sometimes matte photo paper. I would suggest to do what I do and have a separate blade that you swap out for the magnet sheets and another blade for vinyl and paper. It definitely won't cut as sharp on regular paper after you use it on magnet sheets.
Hi there! The Cameo automatically finds the registration marks if they're set up correctly! Check out a blog post about it here: www.silhouetteschoolblog.com/2021/06/silhouette-cameo-4-print-and-cut-max.html