Google has been working on on enhanced split-screen mode for its upcoming foldable

Google Pixel Fold | Image credit — PhoneArena
The Pixel 9 Pro Fold, however, is rumored to have a nearly square aspect ratio, making left-right splits in portrait mode more practical. This functionality was first introduced in Android 14 QPR2 and has been further refined in subsequent updates. Code references in the Android Open Source Project (AOSP) specifically mention the "Pixel Fold 2," strongly suggesting that this feature is designed for the upcoming Pixel 9 Pro Fold.
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In addition to the display's aspect ratio, the resolution also plays a role in enabling this feature. The Pixel 9 Pro Fold's display is expected to have a resolution of 2,076 x 2,152 in portrait mode, which necessitates the left-right split option for optimal multitasking.

Left-right split in portrait mode, expected to launch with Pixel 9 Pro Fold | Image credit — Android Authority
It's worth noting that split-screen multitasking isn't entirely new to Android. It was first introduced in Android 7.0 Nougat back in 2016. However, the implementation on the Pixel 9 Pro Fold, with its unique aspect ratio and resolution, represents a significant step forward in making multitasking more intuitive and efficient on mobile devices.
As the Pixel 9 Pro Fold's launch date of August 13th approaches, it remains to be seen if Google has any other surprises in store for multitasking enthusiasts. While the focus of these updates has been on the Pixel 9 Pro Fold, the benefits extend to other foldable devices as well. As the foldable market continues to grow, features like left-right split-screen multitasking in portrait mode will become increasingly important for maximizing the potential of these devices.
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