# D2
[D2](https://d2lang.com/) snippets can be converted into images automatically for any snippets tagged with the `d2`
language and using a `+render` attribute:
~~~markdown
```d2 +render
my_table: {
shape: sql_table
id: int {constraint: primary_key}
last_updated: timestamp with time zone
}
```
~~~
**This requires having [d2](https://github.com/terrastruct/d2) installed**.
Similar to [mermaid diagrams support](mermaid.md), d2 diagrams:
* Will take some time because of how slow the d2 tool is.
* Can be scaled by using a `+width:<number>%` attribute in the snippet or by setting the `d2.scale` property in the
config file, which is passed along to the `--scale` parameter to the d2 CLI.
## Theme
The theme of the rendered d2 diagrams can be changed through the `d2.theme` [theme](../themes/introduction.md)
parameter. See the available themes in the [d2 docs](https://d2lang.com/tour/themes/).