- Apple held an iPhone event last week, where the iPhone Duo was introduced.
- Nicolas Lellouche spotted the 'Shift Left Edge' setting in iOS 27 during hands-on time at the event.
- The setting, which roughly doubles the left border width, is designed to accommodate cases that cover the left edge of the display.
- Apple offers two official cases for the iPhone Duo, but it's unclear if they cover the left edge; the setting is likely for third-party cases.
- Pre-orders for the iPhone Duo go live October 16, with availability starting October 23.
- The 'Shift Left Edge' setting adds a narrow black border to the left side of the front screen.
- Turning it on then makes the left-hand border roughly twice as thick as it normally would be, although the bezel remains slim overall.
- The idea is to add more black space to the left-hand edge of your phone, so you won’t lose any of the picture to an encroaching accessory.
Apple's iOS 27 introduces a new feature called 'Shift Left Edge', designed to enhance user experience for those using cases that cover the left edge of the iPhone Duo's display. This setting, which can be found in the Display & Brightness menu, effectively doubles the width of the left bezel, providing a narrow black border that prevents content from being obscured by accessories.12457
The Shift Left Edge feature was highlighted by blogger Nicolas Lellouche during a hands-on session following Apple's recent iPhone event. The setting aims to ensure that the iOS back swipe gesture functions correctly, even when a case is in use. The iOS 27 description states, “Moves content when you are using a case that partially covers the left edge of the outer display of your iPhone.”
While Apple has released two official cases for the iPhone Duo, it remains uncertain whether these cases will cover the left edge of the display. It appears that the Shift Left Edge option is primarily intended to accommodate third-party cases, which often tend to be bulkier and may obscure the left side of the screen.
Pre-orders for the iPhone Duo will commence on October 16, with the devices expected to be available starting October 23, 2023. As reviews of the iPhone Duo emerge, more insights into the effectiveness of this feature will be revealed.6
“The setting, spotted by blogger Nicolas Lellouche during last week's iPhone event, is likely aimed at bulky third-party cases rather than Apple's official folio with kickstand. Apple's two official cases probably don't cover the left edge, so the feature addresses aftermarket protection.”








