According to the seller, mg.salles on ebay, this is an S-8 soprano. I'm not going to say that the seller's wrong, because Yani does have some freaky model numbers and serials, but they also have an S8 mouthpiece.
If you want to change how many album pictures per page, use CTRL+ and CTRL- (Command + and Command - if you have a Mac). 80% looks great on my 4K monitor.