One of the marquee features in the new iPhone 6s and 6s Plus is 3D Touch, “an entirely new way to interact with your phone.” 3D Touch includes three types of interaction: Peek, and Pop, and Quick Actions. In some ways, 3D Touch is a right click for the iPhone, offering shortcuts that would not be available otherwise, or that would require more interaction.
The biggest problem with 3D Touch is knowing when it is available. If you press links in certain apps, they’ll show you peeks; for example, a link in an email message in Apple’s Mail shows you a preview of a webpage from Safari. But pressing and holding a link in Twitteriffic, my Twitter client, brings up a share menu, without using 3D Touch (i.e., there’s no force feedback). Also, you need to figure out that pressing and holding a link in Safari provides a preview–a peek–of the webpage that link leads to, but only as long as keep your finger on the display; but if you slide your finger up, then the preview stays visible, and a menu appears below it. It’s all very secretive, and more guidance on when 3D Touch is available would be helpful.
Read the rest of the article on Macworld.