Drag an audio clip from the Clip Bin onto the Audio 1, Audio 2, Audio 3, or PIP Audio tracks. Or, right-click on an audio clip and select Add to Track > Audio 1, Audio 2, Audio 3, or PIP Audio.
To move all clips on a track and maintain the spacing between clips, hold down the <SHIFT> key and drag the clips along the track. All clips to the right of the selected clip shift.