DotCMS licenses are managed from the License Manager under the System → Configuration. A license is not required for the dotCMS Community Edition, but if you are interested in unlocking the full dotCMS feature set, you may wish to request a trial license. To request a license follow these steps:
You will be taken to the dotCMS website. Complete the simple request form and you will receive an email in few seconds with the link to retrieve your 30 day trial license.
Copy the license key from the email link and paste it into the "Activate an Enterprise License" text area and click the "Apply License" button. Your trial license is now activated and your trial license info should display on the License Manager.