> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.metareal.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).

# Level Lines


${youtube}[Level lines](rvuaMlnITwY)

00:03 - Why add level lines?

01:26 - What causes slanting?

02:02 - How to add level lines

02:53 - How to select lines

07:34 - Quick review