From the menu select Licenses. The License Information section summarizes information about your license including how many nodes it covers and how many nodes are currently being used, as well as the license expiry date. You can click Upgrade licenses to purchase additional licenses.
You can also view a list of each license applied to your Portainer installation.
To add a new license to Portainer, click Add license, enter your license key then click Submit.
To remove a license (for example when you want to remove an expired license), tick the box next to the license and click Remove. You will be asked to confirm the removal.
To confirm, click Remove.