Click on the quick action you want to change. They are the four boxes at the top of the menu. Click on the option you want to be a quick action. Your options are as follows: All settings Connect Project Battery saver VPN Bluetooth Brightness Note Wi-Fi Quiet hours Location Airplane mode Tablet mode More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.