The multi-tasking interface introduced in Android Pie (version 9) presents a card-based layout for recently used applications. Swiping upwards from the bottom of the screen, or utilizing a dedicated navigation button if enabled, reveals a carousel of app previews. Users can scroll through these previews to quickly select and return to a previously active application. This method replaced the stacked cards prevalent in earlier Android iterations.
This particular interface enhanced user efficiency by offering larger, more visually distinct previews, thereby simplifying app identification. Its design prioritized quick access and switching between applications, contributing to a more fluid and intuitive user experience. The feature represented a significant design shift, aiming to improve usability and streamline task management on Android devices, differentiating itself from previous implementations and laying groundwork for later iterations.