To create a list, navigate to the Recipients & Lists tab.

Select the recipients you are wanting to add to the list. You can also use the filters to find the recipients you are looking for.

Then select, Bulk Actions and Add to List.

A pop up will display for you to select if you'd like to Create New List or Add to Existing List.

To Create a New List, you will select that option.

Then input the name of the new list you are wanting to add and click Add to List.

To Add to Existing List, you will select that option.

Then select from the drop down which list you are wanting to add the users to and click Add to List.

Once your list has been created you can view the lists created on the Lists tab in Recipients & Lists.