> For the complete documentation index, see [llms.txt](https://docs.meshmorpher.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.meshmorpher.com/graph/metahuman-dna/set-dna-expression.md).
# Set DNA Expression
```
/**
* Node that sets/modifies a facial expression in a MetaHuman DNA asset.
*
* Updates the combined blendshape result for a specific expression,
* computing the necessary individual blendshape changes.
*
* Usage:
* 1. Connect DNA asset and modified expression mesh
* 2. Select expression name
* 3. Click Apply to update DNA
*/
```
| Parameter | Description |
| ----------------------------------------------------------- | ------------------------------------------------------- |
| ExpressionName
string
| Selected Expression. Must be valid. |
| Insert Missing Attributes
boolean
| Wether to insert missing attributes in bone transforms. |
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