Click on  within the goal content section. 
Click on 
Ensure the  checkbox is selected. This will make it available when working with users. If you're not ready, do not check this box. Create an intuitive and distinct . Description is optional. An opportunity type must be opportunity for this opportunity description to be made available when working with the user picklist (Work with user > Opportunity > New). Click  when finished.
The  just created will now be display it on the list.
It is the best practice for admins to check their configuration work. Navigate to a user and click on the  tab.
This sketch cannot currently be displayed in exports
Click 
This sketch cannot currently be displayed in exports
Click on  that is now available on the list.