There is a great way how to manage visible fields, just tap Actions- Visible fields and choose fields You want to be shown in statistics of Customer section.

You can select desirable fields in Statistics section (in header): Customer activity, Customer count, New customers.

Also You can select desirable columns: Name, Surname, Last action, Geneder, Age, Visits, Last action, Points, Time, Check-in, Level, Discount, Deposit, Cashback, Transaction sum, Coupons earned, Stickers earned, Credit limit, Customer number and custom fields.