The gauge here runs the gauge's own UI code: the same C source, LVGL 9.4 and fonts as the firmware, compiled for the browser. Layout, text, gestures, page fades, the editor and warnings behave as they will on the gauge.
It can't show the AMOLED's real colour and brightness, how the touch feels, or how fast the gauge's processor is. Real size is only right after calibrating.
The starting warning limits are placeholders: set them from your engine’s data in Pages.
Hold a bank card against the screen and drag until the box is exactly as wide as the card (85.6 mm). This is saved for next time.