> For the complete documentation index, see [llms.txt](https://help.fluorescent.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.fluorescent.co/cornerstone/general.md).

# General

- [Editing themes](https://help.fluorescent.co/cornerstone/general/editing-themes.md): Learn how to use the Shopify theme editor for customizing your online store templates, sections, and styles.
- [Adding sections](https://help.fluorescent.co/cornerstone/general/editing-themes/adding-sections.md)
- [Using templates](https://help.fluorescent.co/cornerstone/general/editing-themes/using-templates.md)
- [Accessibility](https://help.fluorescent.co/cornerstone/general/editing-themes/accessibility.md)
- [Customizing your site](https://help.fluorescent.co/cornerstone/general/editing-themes/customizing-your-site.md)
- [H1 heading tags](https://help.fluorescent.co/cornerstone/general/editing-themes/h1-heading-tags.md)
- [SEO for Shopify themes](https://help.fluorescent.co/cornerstone/general/editing-themes/improve-seo.md)
- [Online store speed](https://help.fluorescent.co/cornerstone/general/editing-themes/online-store-speed.md)
- [Image guide](https://help.fluorescent.co/cornerstone/general/image-guide.md): Learn how to optimize images for your Shopify online store using your theme. Find tips for great product and editorial photography, file sizes and dimensions, and image customization.
- [Web ready photography](https://help.fluorescent.co/cornerstone/general/image-guide/web-ready-photography.md)
- [Image sizes](https://help.fluorescent.co/cornerstone/general/image-guide/image-sizes.md)
- [File formats](https://help.fluorescent.co/cornerstone/general/image-guide/file-formats.md)
- [Theme image settings](https://help.fluorescent.co/cornerstone/general/image-guide/theme-image-settings.md)
- [Adapting theme content](https://help.fluorescent.co/cornerstone/general/adapting-your-theme.md)
- [Edit default theme content](https://help.fluorescent.co/cornerstone/general/adapting-your-theme/edit-default-theme-content.md): Learn how to use Shopify's default theme content editor to change the wording of your online store, such as shipping and taxes messages, footer text, and button labels.
- [Multiple languages](https://help.fluorescent.co/cornerstone/general/adapting-your-theme/multiple-languages.md): Learn how to sell in multiple languages and translate your Shopify online store, and enable the language and country selector in the Cornerstone theme.
- [Dynamic content with metafields](https://help.fluorescent.co/cornerstone/general/adapting-your-theme/dynamic-content-with-metafields.md): Learn how to show dynamic content on your Shopify store by using metafields in the theme editor. Show specialized content for features like the info popup and complementary products.
- [Unique content for markets](https://help.fluorescent.co/cornerstone/general/adapting-your-theme/unique-content-for-markets.md): Learn how to create custom content for specific markets using Shopify's Contexts in the theme editor. Watch a tutorial video to show international customers unique promotions and shipping details.
- [Update your theme](https://help.fluorescent.co/cornerstone/general/theme-updates.md): We regularly update Cornerstone with changes and improvements. By updating to the latest version, you'll get access to new features and ensure better stability and support for your theme.