Your machine should notify you on the screen when your staples need to be changed. Once you've received your new staples, what you're going to do is you're going to open your finisher panel like this. And then you'll pull your staple cartridge out by pulling on this little green lever. You're going to lift up on the arrows on the side of the cartridge like that. You'll take your your new cartridge and you'll put it—you're ready for that click "Done" and
you're ready to go. It's as simple as that. If you have any more questions regarding your (Toshiba) eStudio 3505 AC or any of our other products, please feel free to give us a call.