# Toggle Constant Z

The Toggle Constant Z command sets a constant front-back value for the keyframe and all frames until the next keyframe (the z-axis does not have to be displayed to change this option). If the front-back value is already constant, then selecting this command will interpolate the front-back value between keyframes.

To activate this command:

- Select Element > Peg > Toggle Constant Z.
- Click the Contextual Menu button in the Timeline window and select Toggle Constant Z.