The customer data is displayed in a list that you can sort by first name, last name or email address Tap New Customer at the bottom right corner to add a new customer or tap an existing customer in the list to edit The first letters of the sorting appear at the bottom of the list to display the list clearly for a specific initial letter; for example, all first names that begin with the letter "d" or all email addresses that begin with the letter "s" In addition to the first name, last name, e-mail address and telephone number, various icons are also visible that provide information If the notifications_off icon is visible, the customer has disabled some messages (booking confirmations, newsletters, etc.), if the phone or envelope is red, the phone number or email address is missing If the link icon is visible, then the customer data is linked to the customer's account; the customer then has control over his data If the warning icon is visible then this customer is on the blacklist, often this is because the customer has arrived late, for example