How to set your Mac Dock to show running apps only

From OS X Daily. Follow the headline link for a detailed walkthrough.

In a nutshell, go to Terminal and enter:

defaults write static-only -bool true; killall Dock

To return to normal:

defaults write static-only -bool false; killall Dock

This has been around a long time, but I’ve never encountered anyone using it. Would love an option to put all running apps in its own section of the dock, as is done with recently used applications. There a setting for that?