A non-functional button has been discovered in the File Explorer app of the latest Windows 11 preview builds, which appears when users hover over a vacant area in the navigation bar. This button is speculated to be related to a feature called "Chat with Copilot," suggesting an interactive element for user experience. Users may soon be able to detach the Copilot interface from the File Explorer window, potentially as a sidebar or pop-up, allowing direct engagement with Copilot regarding selected documents and files.