A when clause: dimension NAME → exact value (matches within ±0.5 of the current step) or inclusive [min, max]. Same syntax and semantics as an overlay's visible_range.
when
[min, max]
visible_range
A
whenclause: dimension NAME → exact value (matches within ±0.5 of the current step) or inclusive[min, max]. Same syntax and semantics as an overlay'svisible_range.