> 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: $w ## Namespace: box ## Article: Introduction ## Article Link: https://dev.wix.com/docs/velo/velo-only-apis/$w/box/introduction.md ## Article Content: # Introduction You can [attach](https://support.wix.com/en/article/attaching-elements-to-a-box) any element to a container box and move the box around, which is a useful way to to keep elements together. Some actions performed on a box affect the elements it contains. For example, [hiding](#hide) a box also effectively hides all the elements in the box, although the values of the [hidden](#hidden) properties of the elements contained in the box do not change.