How to test an S Pen here
Open the page in Chrome or Samsung Internet on the Galaxy phone or tablet and draw with the S Pen. Keep your palm off the screen at first, so the badge reads Pen and not Finger.
- Hover the tip just above the glass. The Hover chip lights up, the same nearness that drives Air view.
- Draw a few strokes, from a feather touch to a firm press. The line should swell smoothly and the gauge should reach 100%.
- Hold the side button and draw: the Barrel chip lights up while it’s pressed. If it never lights, the phone is keeping the button for its own S Pen features and the browser doesn’t see it.
- Pick Pressure ramp and draw one slow stroke from light to heavy. Samsung lists 4,096 pressure levels; the Distinct values reading is how many of them the browser actually passed on in your strokes, which can be fewer.
What the result tells you
When the ramp’s trace climbs evenly to the top, the digitizer, the S Pen and the browser all pass pressure on cleanly. A curve that jumps, sticks at one value or never reaches the top is worth retesting in a drawing app, to see whether it follows the pen or the browser.
The Straight line and Diagonal line tests show jitter as pixels of shake around a ruler-straight line. On a phone screen, rest the pen’s side against a ruler and draw slowly.
A fingertip on the same screen still draws, at a fixed width, but the tester never reads it as pressure. Any other pen works on the base pen pressure test, and the tilt test checks lean in four directions.