Click + drag on the canvas to interact with the touchscreen. Letter / arrow / modifier keys are forwarded to the device whenever the canvas has focus — a green keyboard badge in the top-right of the viewport lights up while that's the case. Click outside the canvas (a tray button, the clipboard textarea, anywhere on the page chrome) to drop capture so Ctrl-L, Cmd-W and other browser shortcuts work normally; clicking back onto the canvas resumes capture. Rotate ↺ / ↻ flip the device 90° (both the device and the canvas). The right-side panel toggles iOS appearance + accessibility knobs (light/dark, dynamic text size, reduce motion, reduce transparency, increase contrast, button borders, color filter, liquid-glass opacity) via the CoreDevice ConfigurationService.