Use consistent vertical metrics to prevent unexpected slips between lines, especially across languages with diacritics. Small contour‑like shifts can mark sections, but avoid whimsical waves that impair scanning. Reinforce rhythm with micro‑rules and subtle notches, echoing terrain without turning paragraphs into decorative illustrations or distracting ornaments.
Create type scales that double gracefully, so posters, trail headers, and garment tags share ratios. Mind the smallest interface element that must still be legible when hands shake with cold. Commit to numeric scales, document them, and resist ad‑hoc exceptions that fragment consistency across teams and seasons.
Guide readers along a safe path from loud to quiet. Headlines announce summits, decks provide bearings, and captions place feet on stone. Mark dangerous shortcuts—dense jargon, tiny legalese—with design guardrails so essential notices never vanish under decorative flourishes or avalanche of competing claims and distractions.