> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/manual-for-opentx-2-2/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.open-tx.org/manual-for-opentx-2-2/software-overview/radio_menus/radio_global_functions.md).

# Global Functions

Global functions are special functions that are applied across all planes.

Refer to [Special Functions](/manual-for-opentx-2-2/software-overview/model_menus/special_functions.md) for information on allowable settings.

![](https://274237988-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MRzpA59TKutI-lAv_5j%2Fsync%2F73b0af3448a928e3f5b1fe91437f071435c0cf27.png?generation=1611683699291321\&alt=media)