These controls mirror the main product: timeline, observer, camera, and experiment parameters.
Timeline — Drag the slider to scrub through time, or use Play to watch hits accumulate on the detection screen. Reset jumps back to the start.
Which-path / observer — Turn on to model knowing which slit the particle went through; the pattern moves toward two bands. Turn off to bring back interference.
Camera — Drag to orbit, scroll or pinch to zoom, right-drag (or trackpad two-finger) to pan—full 3D around the bench.
Parameters & Recompute — Slit width, separation, and wavelength (colour). After edits, Recompute regenerates the particle set. Extended options in this build add mass-related behaviour for some interpretations.
Interpretations & ℹ — Tabs switch the story and overlays (Copenhagen, pilot-wave, etc.). The ℹ panel explains the active view without changing the underlying simulation.
Theme — Use the sun/moon control in the header for light or dark UI.
Tour — On the classic demo, use ▶ Tour next to ℹ for a guided walkthrough.