How do I change from a USB connection to a wireless network connection?

For Windows: From your computer, click Start > All Programs > HP > HP Photosmart 7520 series > Printer Setup & Software Selection, then click Convert a USB connected printer to wireless and keep the USB cable connected until prompted to disconnect. For Mac: From the Home screen of your printer display, touch the Wireless icon, then Wireless Setup Wizard, and follow the steps to connect the printer.