Six regions, one shared scale: each panel is a real chart, and all six are pixel-aligned so the shapes compare honestly. Hover anywhere: the crosshair sweeps every panel at the same month.
trellis.by: 'region' is the whole configuration. The trellis
owns everything shared: the y domain (union of all panels, so panels never
lie), the x window, one legend (click Target to hide it in
every panel), one zoom/pan/reset toolbar, and the responsive column count
(resize the window: 3 → 2 → 1 columns from
minPanelWidth alone). The keyless Target series
repeats in every panel as a reference line. Trellis is a premium feature;
without a license it renders with a trial watermark.