It has been confirmed that Google is developing a new feature called "Cast trackpad," which allows users to use their smartphone screens as remote trackpads.
This information was revealed by Android Authority following an analysis of code within version 1.0.1283.974003524 of Google's Cross-Device Services app.
Details of the "Cast Trackpad" Feature
According to Android Authority's report, "Cast trackpad" is believed to be a feature designed for remotely controlling other hardware, such as Googlebooks, via a smartphone touchscreen.
In addition to basic gesture controls like pointer movement and tapping, the feature includes dedicated controls such as a "Back" button and volume adjustment buttons.
Additionally, the codebase reveals options to change the scroll direction and adjust sensitivity settings based on user preference.
Potential Link to Googlebook's "Cast My Apps"
Screens related to "Cast My Apps," a Googlebook feature that allows users to directly operate smartphone apps on a laptop's larger screen, were also found in the same version of the Cross-Device Services app.
Given the timing of this discovery, "Cast trackpad" could potentially be one of the features integrated with Googlebooks scheduled for release in Fall 2026.
While not explicitly designated solely for Googlebooks, potential use cases include operating presentations remotely via a smartphone when connected to a projector.
As this feature remains under active development, its final specifications and release timeline are still unconfirmed. However, with Google's Googlebook preview event scheduled for September 15, 2026, it may be officially unveiled alongside the hardware.