Gitlab.com has some helpful information on [wiki-specific markdown](https://docs.gitlab.com/ee/user/markdown.html#wiki-specific-markdown)
## Sidebar
Unfortunately, their sidebar is automatically alphabetically sorted and doing page hierarchy doesn't work very well. So you can customize the sidebar by going to the [_sidebar.md file and editing it](https://git.commerce.gov/enterprise_applications/documentation/wikis/_sidebar/edit) as you would any other MD file.
## Visualizations
You can use mermaid for various visualizations.
*[Their documentation on flowcharts](https://mermaidjs.github.io/flowchart.html).
*[Their documentation on sequence diagrams](https://mermaidjs.github.io/sequenceDiagram.html).
*[Their documentation on gantt diagrams](https://mermaidjs.github.io/gantt.html).
In addition, for architectural diagrams, we are using PlantUML. See [gitlab's documentation](https://docs.gitlab.com/ee/administration/integration/plantuml.html#creating-diagrams) on how to use it.
## Tables of content
Want a sweet TOC that inherits the header organization you worked so hard on?
Wish it could be like the one on this page? It's super easy! See below:
