Add Domains/URLs or Keywords
When inside a project in the top right corner there is a button labeled "Add Keywords & Domains":
It will then allow you to add new keywords in the first textbox and in the 2nd textbox you can add new domains/urls:
Once you click save give it about 2-10 mins to add completely process your new data. The system will then start crawling Google for your data and notify you when it finds new rankings.