> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.textit.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Function Reference

You can use expressions in your flows to customize messages and make more complex splits. See our detailed guide on Expressions [here](https://textit.com/mr/docs/expressions.html) and see more about expression syntax [here](https://help.textit.com/en/article/expression-syntax-1apdx1n/). 

Syntax and variables within expressions are visually distinguished using color highlighting. This makes them easier to identify and helps keep logic clear and organized.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/a/9/f/7a9fc4558a9de000/screenshot-2026-04-28-at-62747_ehjr19.png =400x425)

If you have any questions, send us a message via the support widget in the bottom right corner.