Hello! To do this, first click on your godchild, and the select the tab "More Options" on the sidebar. This will lead you to a bunch of new buttons, one of them being "Select parents". The godchild probably already has their biological parents set as Primary parents, so you'll want to scroll down to "Second parents" and select the designated godparent. Then, you can click on "Type of parents" below the fields for second mother and second father and choose "godparents".
If you want to assign two people as godparents who are not a couple (i. e. the kid's mother's brother and mother's sister), you'll need to assign one godparent as second parent and one as third parent (i. e. the aunt is classified as second mother, the uncle as third father); otherwise the program will display both godparents as a couple.
Hope this helps!
