Vellum documentation

Vellum is the fashion theme that is fast, honest about what is included, and survives its own updates. This site is the self-serve answer to every setting and process in the theme.

The three guarantees

• Update-safe by architecture. Your customizations live in settings Shopify preserves; developer additions live in a protected zone. How updates work.
• Published speed score. Mobile Lighthouse 85 or better, measured per release on the exact shipped package. The budget rules.
• No missing basics. Swatches, filtering, mega menu, back-in-stock, cross-sell, and more, built in. Every setting explained.

Common tasks

• Change fonts, colors, spacing: Theme editor, then Theme settings. Reference.
• One-off CSS tweak on a single section: that section's Advanced customization box. Guide.
• Update the theme without losing work: the update contract and each release's upgrade guide.