If you have ever wished that you could turn your volume up on your Mac just a little bit more, but not a full "click" because then it would be too loud. Or if it is a little too loud and if you turn it down a full click you can't hear it then this keyboard short cut is for you. If you press and hold the Shift and Option key and then press on the volume up or down key that will allow you to edit the volume by increments of 1/4 instead of full increments. Check out the video below to see what happens.