Search, navigation & shortcuts — Back out with Esc
Esc always closes the topmost thing first: the palette, the ask panel, the Build with AI dialog, the navigation drawer, then the peek drawer one stacked record at a time, then a cell edit, and finally the cell selection itself. Press it repeatedly to unwind all the way back to the page.
On small screens the rail tucks away into a slide-out drawer. Open it with the menu button at the left of the topbar; tapping the dimmed backdrop, choosing any link, or pressing Esc closes it again.