> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/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/opentx-2-3-lua-reference-guide/part_iii_-_opentx_lua_api_reference/model-functions-less-than-greater-than-luadoc-begin-model/setcustomfunction.md).

# model.setCustomFunction(function, value)

Set Custom Function parameters

@status current Introduced in 2.0.0, TODO rename function

## Parameters

* `function` (unsigned number) custom function number (use 0 for CF1)
* `value` (table) custom function parameters, see model.getCustomFunction() for table format

## Return value

none

### Notice

If a parameter is missing from the value, then that parameter remains unchanged.