# 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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