Go to your search results or find your contact(s) then select the contact(s) you want to add to a list. Once selected, click on the "Add to List" button. This will open a pop-up window where you can either:
1. Select an existing list to which the contacts can be added, or
2. Create a new list. Then add the contacts to the list. Please note this is a 2-step process of first creating the list and then updating the list so that the contacts are added.
This process is explained in more detail in this guide.