A slightly faster way to get to the List Settings for each list is to click on the Gear where you would normally go to find the Advanced Flex Setting list. From there you will find a reference to the list’s settings. With one click you are now in the List Settings for that list.
Note: There is no set up required for this new feature. It is automatically added for Admins and Full Control users in the September 2017 update.
And if for some reason you do not want this to appear you can add the following Setting with a Value of False to turn it off.
Setting Name: AddListSettingsToMenu
Setting Value: False