How to start local AEM instance as QA publish environment?

In order to start our local instance as our project QA environment, we need to do the below changes.

Step1: start your local instance using the below command using terminal/command prompt.

java -Xmx512m -jar AEM-author-p1992.jar -Dsling.run.modes=publish,qa. 

Step2: After that navigate to "/crx-quickstart/conf" folder and open sling.properties file append/add bellow line of command and save it. 

"sling.run.modes=publish,qa"

now your local instance will work as a QA environment.