> For the complete documentation index, see [llms.txt](https://docs.mixeffect.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mixeffect.app/automate/shortcuts/actions/preview-transition.md).

# Preview Transition

**Parameters**

* **Mode**: Choose From toggling, enabling, or disabling the Preview Transition mode.
* **Mix Effect Block Index**: The Mix Effect Block to change. Default is M/E 1.

**Returns**

Nothing