> For the complete documentation index, see [llms.txt](https://mrwheel-docs.gitbook.io/yappgenerator_en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mrwheel-docs.gitbook.io/yappgenerator_en/advanced-options/specify-a-pcb.md).

# Specify a PCB

```
n(g) = [yappPCBName, "XXX"] : Specify a PCB. Defaults to [yappPCBName, "Main"]
```