I use this action to speed up the process of dropping the take volume of small items such as breaths in vocals. You first split the item before the breath or section you want to reduce in volume, than move to the end of the breath and invoke the custom action. It will split at that point, select the item to be dropped and reduce by 9db, the action than moves back a bit and starts playback. So you will hear the results of the volume reduction and if your happy, than can allow playback to continue until you get to the next edit you want to make. This action will split at the edit cursor