Apple added Reachability support to the iPhone Duo in the iOS 27.3 beta, allowing owners of the foldable to more easily reach things from the other side of the large internal display. The iPhone Duo has a massive internal screen, but while ideal for two-handed use, some may still lament the inability to access everything with a single thumb. As part of the update, Reachability will temporarily shift the left or right side of the screen to the other side with a short swipe, making every part of the interface accessible from one hand.
To enable it, users must open Settings, select Accessibility, followed by Reachability, and then activate the feature. In use, a short swipe left on the left edge of the screen will move the opposing side's content closer to the left. Likewise, a short swipe right on the right edge of the main display will move the screen's content to the right.
Reachability has been around for a few years already in iOS, allowing users to more easily access the top section of the iPhone's display with their thumb. For the iPhone Duo, it is being employed to extend a user's reach horizontally, rather than vertically.
Source: AppleInsider · Summarized by HeadlinesBriefing