> For the complete documentation index, see [llms.txt](https://emotiv.gitbook.io/emotivbci/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emotiv.gitbook.io/emotivbci/facial-expressions/training-facial-expressions.md).

# Training facial expressions

On top of the default detections for Facial Expressions, you can train a subset of these expressions - Frown, Clench, Smile, Surprise - to personalize them for you. In most cases, training your own expressions rather then using default detections will give you more precise control.