> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt ## Resource: About Multi-State Boxes ## Article: About Multi-State Boxes ## Article Link: https://dev.wix.com/docs/develop-websites/articles/wix-editor-elements/other-elements/multi-state-boxes/about-multi-state-boxes.md ## Article Content: # Velo: About Multi-State Boxes Use multi-state boxes to display different content for different situations. For example, you can: - Show different site content if a shopping cart is empty or full. - Display an error state when something goes wrong. - Show a preloader while a page is loading. - Switch between "sale," "new," and "out of stock" badges for your products. - Show different site content depending on whether there's an upcoming event.
**Tip:** Changing the box state might [impact your page layout](https://dev.wix.com/docs/develop-websites/articles/wix-editor-elements/formatting-layout/how-page-layout-is-affected-when-elements-change-size.md).## See also - Learn how to [set up your multi-state box](https://dev.wix.com/docs/develop-websites/articles/wix-editor-elements/other-elements/multi-state-boxes/setting-up-your-multi-state-box.md). - Learn how to [work with your multi-state box and code](https://dev.wix.com/docs/develop-websites/articles/wix-editor-elements/other-elements/multi-state-boxes/working-with-multi-state-boxes-and-code.md).