End user can customize their view from the menu [View]-[Customize This View]. That way, end user who do not have designer access can customize their mail view as they like.
However, it is sometimes hard work for end user to change all of folders/views since there could be a lot of folders and usually they want to use the same customization for all of mail folders.
that's why they request the feature to customize selected views settings at a time.
This problem was previously tracked as HNAA7CDSSZ.