How Do I Select and Save Contacts to a Segment?

You can select recipients according to the attributes you have set up in your account. 

Click on the Contacts tab and navigate to Active Contacts.  

Click on Advanced Search.

Here you can select which attributes you want to search by. You can search by multiple criteria by clicking to add more conditions. Click on Search and you will see all contacts who meet these conditions.

All contacts with the desired attributes are selected by default. However, you can also select or deselect individual contacts. Then click on the gear icon (next to the Quick Search box) and click Save to Segment. 

This will open up a new window where you can select a segment. Finish by clicking OK.