option in the RotoPaint tool settings is on, which means your changes to a stroke/shape automatically creates keyframes and animates your stroke/shape. You can also access all the curves and shapes in the Curve Editor and Dope Sheet.All strokes/shapes that appear on more than one frame can be animated. By default, the autokey option in the RotoPaint tool settings is on, which means your changes to a stroke/shape automatically creates keyframes and animates your stroke/shape. You can also access all the curves and shapes in the Curve Editor and Dope Sheet.
NOTE: Frame by frame updates in Nuke’s interface can be expensive, and real-time playback can suffer as a result.
The optimize Viewer during playback button 
in the Viewer tools stops updates elsewhere on the interface during RAM cache playback, helping to optimize the playback frame rate.
| 1. | Draw a stroke/shape that appears on more than one frame. By default, the autokey  option in the RotoPaint tool settings is selected and a keyframe is automatically created in the first frame your stroke/shape appears. |
| 2. | Move to a new frame. |
| 3. | With one of the Select tools, select the points or the stroke/shape you want to animate. |
| 4. | Adjust the points in your stroke/shape position or change the stroke/shape’s attributes as necessary. A new keyframe is automatically set. The frame marker on the timeline turns blue to indicate the selected stroke/shape is animated. |
| 5. | Repeat steps 2, 3 and 4 for all the frames you want to set as key frames. |
TIP: Note that if you are translating an entire stroke/shape using the Transform tab, RotoPaint also draws a track of the stroke/shape’s animated position. You can, for example, use the track in another node (such as Tracker or CameraTracker) by Cmd/Ctrl+dragging the values from the translate animation button to an appropriate field in another node.
If you choose to switch the autokey function off, you can still create key frames manually. You can set key frames to the entire stroke/shape, or the stroke/shape’s spline, transformation or attributes.
| 1. | Move to the frame where you want to create a keyframe and select your stroke/shape. |
| 2. | Do one of the following: |
• If you want to create a key that is set to animate the entire stroke/shape, right-click on the stroke/shape and select set key > all.
• If you want to create a key that is set to animate a position, right-click on the stroke/shape and select set key > spline.
• If you want to create a key that is set to animate transformation, right-click on the stroke/shape and select set key > transform.
• If you want to create a key that is set to animate attributes, right-click on the stroke/shape and select set key > attributes.
If you have autokey 
turned off, you can only adjust a point in a stroke/shape at a keyframe. In other words, in order to make changes to a point, you either have to move to an existing keyframe on the timeline, or you need to create a new keyframe first.