Family Search Tutorial: Connecting Your Spouse's Tree to Your Own

Adding your spouse's tree to your own on Family Search is simpler than you might have thought.
NOTE: Living individuals can only be seen on your own tree in your account for privacy reasons. So you need to add them yourself from scratch.
First, add any living individuals as new records, including whatever information you have about them.
Second, one by one, add any deceased individuals on your spouse's tree using the "Add By ID" tab and typing in the 7 character ID XXXX-XXX found just under the individual's name.
Third, select either the individual or the couple to add to the tree. You'll notice after adding them that you can any other generations that are already connected.
Lastly, have your spouse repeat this process on their account.