---
description: Saves the current position of the Flying Key to the A or B keyframe slot.
---

# Flying Key KeyFrame

| Message                              | Description                                                               | Arguments |
| ------------------------------------ | ------------------------------------------------------------------------- | --------- |
| `/mixeffect/usk/flying-key/keyframe` | Saves the current position of the Flying Key to the A or B keyframe slot. | Multiple  |

| Argument | Type    | Description                                          |
| -------- | ------- | ---------------------------------------------------- |
| Keyframe | Integer | <p>0 = A<br>1 = B</p>                                |
| USK      | Integer | One-based index of the Upstream Keyer. Default is 1. |
| M/E      | Integer | One-based index of the Mix Effect Bus. Default is 1. |
