Sorting the contacts of a phonebook

The contacts of a phonebook can be sorted (in alphabetical order, or by their numbers). This can be done by clicking on the title of the column.

For instance, if you wish the contacts to be sorted by name, click on the title of the Name column. Clicking the column title again will reverse the order (ex: from A to Z, or from Z to A).

Sorting the contacts by their phone number is done in a similar fashion.