Playlist Commands occur in three places in Songbird:
1. In the toolbar at the bottom of the medialistview ('toolbar')
2. In the context menu that appears when you right click on a track ('mediaitem context menu' or 'mediaitem menu')
3. In the context menu that appears when you right click a service pane node ('servicepane context menu' or 'servicepane menu')
Even though the mediaitem context menu appears when right clicking an individual track, playlist commands can only be registered at a medialist level. Thus the commands registered to the mediaitem context menu will be the same for all tracks in a specific medialist (However, when an individual command appears can be controlled by the selected mediaitem through the command's visibility callback, so it is possible to have commands that are only usable when right clicking on a specific track).