# Update or Remove Faces and Databases

To update or remove a face use the following actions:

- To complete training for all faces that exist in the Media Server database but have incomplete training, use the action `BuildAllFaces`. To confirm that training was successful, use the action `ListFaces` (see List the Faces in a Database).
- To add additional training images to a face, use the action `AddFaceImages`. Media Server does not use the new images for face recognition until you run training using the action `BuildFace` or `BuildAllFaces`. To confirm that training was successful, use the action `ListFaces` (see List the Faces in a Database).
- To remove a training image from a face, for example if Media Server cannot detect a face in the image, use the action `RemoveFaceImages`.
- To change the label of an image that you added to a face, use the action `RelabelFaceImage`.
- To move an image of a face from one face to another, for example if you add an image to the wrong face, use the action `MoveFaceImage`.
- To add, remove, or update custom metadata for a face, use the actions `AddFaceMetadata`, `RemoveFaceMetadata`, and `UpdateFaceMetadata`.
- To change the identifier of a face you added to a face database, use the action `RenameFace`.
- To move a face to a different database, use the action `MoveFace`.
- To remove a face from a database and discard all associated images and metadata, use the action `RemoveFace`.

To update or remove face databases, use the following actions:

- To rename a face database, use the action `RenameFaceDatabase`.
- To delete a face database and all of the information that it contains, use the action `RemoveFaceDatabase`.

For more information about the actions that you can use to train Media Server, refer to the Media Server Reference.

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