With Screens running on your Mac, follow these steps:
Go to the Screens app menu.
Select Screens Connect > Sign In...
Enter your Screens ID and password.
Click the Sign In button.
Upon signing in, you should see every Mac and Windows computer you've installed Screens Connect on. The antenna icon next to the computer name means that the Screens Connect service is enabled on that computer.
The next time you connect to this computer, Screens will determine whether your computer is available on your local network. If it's not, Screens will query our Screens Connect server for the computer's network information. This process is all seamless, and you shouldn't see a difference between connecting via local network or via the Internet!