Increase Number of Transients ⌃=
Increase the number of transients. The latest (10.6.1) online documentation incorrectly states that command-plus is the keyboard command. It is control-equalsign.
A transient detection process is started for the audio material around the clicked position, and the transient with the highest energy becomes valid and is marked. If no transient is found in the catch area, a transient marker is created at the clicked position.
Plus button (+): Increases the number of transients in the selected area of the audio file, or across the entire audio file. You can also use the Increase Number of Transients key command, default assignment: Command-Plus (+).