Mechanism arrow polish

Instructor tool: adjust per-arrow display geometry on on-disk goldens (data/mechanisms/*.json). Chemistry (source/sink maps) is unchanged — only curvature and tip placement for worked figures and overlays. Sign in below (or paste an API key), pick a golden, then drag the shaft to bend, Add curve point for multi-elbow routes (around a hydrogen, etc.), drag the start/end dots to nudge tips, and Save.

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Step

Arrows

Select an arrow: drag the shaft sideways for a simple bend, or Add curve point (up to 3) and drag the diamond elbows for a hand-routed multi-curve path — useful for looping around a nearby H. Drag start/end dots to nudge tips. Chemistry anchors stay fixed. Unsaved changes stay local until Save.