# Advanced

- [Functions on variables / Modifier](/project/advanced/functions-over-variables-modifier.md)
- [Environment Tagging](/project/advanced/page-block-environment-tagging.md): Environment tags allow to have specific behaviours only in specific context. Environment of blocks/pages allows you to create blocks visible only on some websites using the theme.
- [Differentiate live website and local website](/project/advanced/differentiate-live-website-and-local-website.md)
