cyberLabelZoneTop top-level constant

double const cyberLabelZoneTop

The key label zone (fraction of the face height): only the opaque face, its contrast-safe flare and hover layers and the perimeter edge line (≤ 3.5 dp in: Hazard plates inset theirs behind a 1.5 dp black rim) may lie between these rows, so contrast(label, face) is the worst case a label ever sits on. Ticks, bloom bands and the hold bar stay in the bands above and below.

Implementation

const double cyberLabelZoneTop = 0.28;