Holding Ctrl ( ⌘ on a Mac) when the Multi-Tool is being used temporarily converts the tool to the Timeshift-Tool, so can be used to drag clips from one place to another.Holding Ctrl and Shift ( ⌘ and Shift on Mac) then dragging in the Timeline loop plays the Cut Preview. The durations played before and after the region can be changed in the Cut Preview section of Playback Preferences. This provides a preview of what cutting that region would sound like. Holding Ctrl ( ⌘ on a Mac) then dragging in the Timeline and releasing the drag will play by default two seconds before the Quick-Play region and one second after it.Holding Shift then dragging in the Timeline and releasing the drag will Loop Play that Quick-Play region.Holding Shift then clicking on the Record button on Transport Toolbar records on a new track rather than recording on the same track.Similarly, holding Shift then clicking on the Play-at-Speed button on Play-at-Speed Toolbar Loop Plays at your chosen adjusted speed and holding Ctrl ( ⌘ on Mac) then clicking the Play-at-Speed button cut previews at adjusted speed.

When there is a selection region, holding Ctrl ( ⌘ on Mac) then clicking the Play button will play by default two seconds before the region and one second after it in order to preview what deleting the region would sound like. Holding Shift then clicking on the Play button on Transport Toolbar Loop Plays the track or selection over and over until you stop.The following mouse-with-keyboard shortcuts are available.

Audacity for mac manual