iPhone Duo offers clever fix for cases blocking folding edge
What's the story
Apple's upcoming iPhone Duo will come with a unique feature called "Shift Left Edge." First spotted by blogger Nicolas Lellouche, the option is part of the display settings and adds a black border on the left side of the outer screen. The purpose of this artificial bezel is to move content away from the folding edge when certain cases are used.
Feature functionality
How the 'Shift Left Edge' option works
When activated, the "Shift Left Edge" feature effectively doubles the width of the black border on the left side of iPhone Duo's outer screen.
The official description for this setting states that it "moves content when you are using a case that partially covers the left edge of the outer display of your iPhone."
This suggests its primary purpose is to ensure optimal visibility and usability even with certain case designs.
Case compatibility
Will Apple's 1st-party cases require this setting?
At launch, Apple will offer two first-party case accessories for the iPhone Duo: the standard iPhone Duo Case and an advanced model called the iPhone Duo Folio with Kickstand.
However, it's not clear if these cases would cover the left edge enough to warrant this setting.
The tech giant may be considering that this feature could come in handy with other, more rugged case designs from third-party accessory makers.
Release timeline
iPhone Duo to go on sale on October 23
The iPhone Duo is set to go on sale next month, on October 23.
As we get closer to the launch date, more details about this unique feature and its compatibility with Apple's first-party cases will likely emerge.
The "Shift Left Edge" setting is just one of the innovations that Apple is introducing with its latest smartphone model.
Twitter Post
Take a look at the demonstration
Sur iPhone Duo, il existe un mode pour ajouter une bordure artificielle à gauche. Apple le présente comme conçu pour améliorer l’utilisation avec certaines coques. pic.twitter.com/BV1tamWaU0
— Nicolas Lellouche (@LelloucheNico) September 12, 2026