Apple's iPadOS 26.4 beta introduces a new feature that addresses a growing pain point for multi-window users. After iPadOS 26 launched with a more flexible windowing system, users gained the ability to open and resize multiple windows freely. However, this freedom has made it easier to lose track of hidden windows.

In the latest beta, Apple is testing a popup that appears when launching an app with multiple hidden windows. The notification displays 'X Hidden Windows' and lets users quickly reveal all open windows with a tap. The popup appears to flow from the app icon's location, similar to the old Shelf feature from iPadOS 15.

The feature doesn't trigger every time, suggesting Apple may be testing timing thresholds to avoid notification fatigue. This makes sense since constant popups could become annoying during rapid app switching. While most iPad users may never need this, it's a thoughtful addition for power users who frequently work with multiple windows of the same app.