The trace runs the length of the page.
Every reading is a full-width register stacked on the strip — a header of evidence, a trace field, a calibration ruler. The active channel wears a single amber bracket on the one event under examination; nothing else lights up.
Stacked registers, never tiled cards.
A trace that threads
One waveform carries the structure from masthead to footer. Layout follows the line, not a grid of equal boxes.
One live reading
Amber is the heated stylus. It marks the single event being measured — never a second highlight, never a fill.
Erased is kept
A missing reading is held as a labelled void with rubbed hatch — evidence of absence, not a hidden row.
Labels read like a field manual.
Coordinates, amplitudes, confidences, timestamps and states — not marketing copy. The instrument tells you what it measured and how sure it is, in mono, at the size you can read.
Mount a channel. Run the strip.
Litmus ships as a self-contained reading language — registers, trace fields, calibration rulers, and one amber bracket, on a cool slate panel.