FAQ
Answers to the questions customers ask most.
General
Do I need any apps to use Lumen? No. Every feature works with Shopify on its own. Lumen supports app blocks, so apps you install can add content to product pages and other sections.
Will switching styles delete my content? No. Switching style changes colours, fonts and buttons; your sections, text and images stay. See Styles.
Does Lumen work on phones? Yes. Every section is designed for phones first and tested at 390px wide.
Is Lumen accessible? Lumen is built to WCAG 2.1 AA: colour contrast is checked in every style, every control works with a keyboard, moving content can be paused, and animations respect your visitors' reduced-motion setting.
Images
What size should my images be? At least 2000px wide for full-width sections such as heroes and slideshows, and at least 1200px for product photos. Shopify serves smaller versions to smaller screens automatically.
My image is cropped in the wrong place. Set a focal point: select the image in the theme editor, click Edit and click the most important part of the picture.
Why do I see grey illustrations? They're placeholders shown in the theme editor while a section has no image. Add an image and they disappear; customers never see them.
Products
How do I show colour swatches? In Shopify admin, link your product's Color option to swatch colours. Lumen shows colour dots automatically.
How do I add a size chart? Add the Size chart block to the product page in the theme editor. Fill it in once for every product, or connect it to a product metafield for a different chart per product.
Can customers buy from a collection page? Yes. Turn on Quick add in Theme settings → Product cards.
Updates and support
How do I update Lumen? When a new version is released, Shopify shows an update notice in Online Store → Themes. Updating adds the new version to your theme library with your settings and content copied across, so you can check it before publishing.
How do I get help? Contact support with your store address and a description of the issue. We reply within two working days.