Depending on your Company's plan, you will have a certain number of Live Outputs available. If you are a company admin, find your Outputs quota under the Company Usage section.
For this reason, while an Output is disabled, it will show a watermark. You can use this mode to prepare and test your Graphics.
Setting the Output Live
To set it live, open the Graphics Package's remote control. You will find a button to set it live in the top bar.
You will also be able to enable the output from the Experience Home.
Read more about your Graphics Output Quota here.