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# Track navigation events

Respond to requests to change which part of a media item plays.

## Topics

### Responding to track navigation events

[`class MPChangePlaybackPositionCommand`](/documentation/MediaPlayer/MPChangePlaybackPositionCommand)

An object that responds to requests to change the current playback position of the playing item.

[`class MPChangePlaybackPositionCommandEvent`](/documentation/MediaPlayer/MPChangePlaybackPositionCommandEvent)

An event requesting a change in the playback position.

[`class MPSeekCommandEvent`](/documentation/MediaPlayer/MPSeekCommandEvent)

An event requesting that the player seek to a new position.

[`class MPSkipIntervalCommand`](/documentation/MediaPlayer/MPSkipIntervalCommand)

An object that defines the skip intervals for the player.

[`class MPSkipIntervalCommandEvent`](/documentation/MediaPlayer/MPSkipIntervalCommandEvent)

An event requesting a change in the current skip interval.


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