Clicking New displays the following window.
List Name: Enter a name for the distribution list you are creating.
All Customers: Select to include all the customers into the distribution list.
Note: Once All Customers option is selected, the buttons Inset List, Delete List and Clear List are disabled. But you can either use the option Save List or Cancel.
Specific Customers: Select to include specific customers in the distribution list.
Insert List: Click to add filters so that only those customers satisfying the conditions set are included in the distribution list.
Filter Type: Select the required value from the list
Field Name: Select the field from the list on which you want to set the filter conditions.
Criteria: To set criteria click on 
button. The window to select value is displayed as shown.
Join: Select And or Or from the list as required, click Insert List if you want to add more conditions.
Delete List: To remove the selected filter criteria
Clear List: To clear all the filters
Use this option to compose a Mailer which can be either printed or sent through e-mail.