Can I reduce the time to display the list of running windows when clicking and holding the icon of a running application in the dock?
If your Mac has a trackpad, you can click with two fingers to bring up that menu without delay. If it has a Magic Mouse, you can click on the right side of the mouse. If it has a standard PC mouse, you can right click, and whatever hardware you have, you can also hold Control while clicking to do the same thing. This also brings up other context menus in all sorts of places in the system! Hope this helps.