Handoff is a feature of iPhones, iPads, Apple Watches, and Macs that lets you start something on one device and then complete it on another. For example, you might start reading a web page on your iPhone and then realize you’d rather kick back and read on your iPad or MacBook. With Handoff, making that switch is a cinch. No more noting down the URL or emailing it to yourself for opening on a second device.

You will need to meet a few prerequisites for using Handoff. Both devices must be on the same Wi-Fi network, have Bluetooth turned on, and be signed into the same iCloud account. Assuming your devices meet those conditions, using Handoff is easy. Apple’s first-party apps like Safari, Mail, Messages, and Pages all support Handoff right off the bat. Third-party developers can add support for Handoff as they see fit. No matter which app you’re using, using Handoff is the same.

A file with the .pptx file extension is a Microsoft PowerPoint Open XML (PPTX) file created by Microsoft PowerPoint. You can also open this type of file with other presentation apps, like OpenOffice Impress, Google Slides, or Apple Keynote. They are stored as a compressed ZIP file, which use a bunch of other files with formatted text, images, videos, and more to open them.