The items of the toolbar showed to the right allow to manage tracks. The first one creates a new track with the same characteristics as the current track. This can also be achieved with either the Add New Mono Track item or the Add New Stereo Track item in the Sound menu. The second toolbar item deletes the current track, which can also be done via the Delete Track menu item. The third toolbar item allows to split a stereo track into two mono tracks, one for each channel. This corresponds to the Split Track menu item. It is very useful in situations where the two channels of a stereo track really correspond to two completely different parts of a recording (like the vocals and the background music or the two participants in a Skype conversation) and should be edited separately. The Merge With Next Track menu item is the opposite of the Split Track function and allows to combine two mono tracks into one stereo track.
Most track-related functions described above can also be accessed by right-clicking (control-clicking on a one-button mouse) into the shaded gray area at the top of a given track.
