Admin can manage Preferences from settings option.
Time Zone: Time zone refers to the local time of a region or a country.
Row per page: How many rows will show per page you can select now.
Date separator & Date format: Different types of date separator sign can use in your site. Also can select your desirable date format.
Money Symbol position: Before or after how you want to see your home currency symbol?
Decimal Format: After how many unit you want decimal point just select it.
Thousands Separator: Comma(,) or dot(.) two options are available as thousands separator.