In order to add more than one spouse for a person, you can use the Add Spouse feature located by clicking on the Edit button and then Add a Spouse.

When you add a spouse, the new spouse will be shown automatically. In order to return to the previous spouse, go to the genealogy card of the person you added the spouse for. You will see a list of all the spouses of that person. Click on the name of the person you want to view.

If you would like to change the order in which spouses appear by default in the tree, use the Manage Spouses function in order to change the Status of a spouse from primary to secondary or vice versa.