Configure Scratch Orgs with New Features
Where: This change applies to Lightning Experience, Salesforce Classic, and all versions of the Salesforce app in Developer, Enterprise, Group, and Professional editions.
Who: You can create scratch orgs if you turned on Dev Hub in your production org, enabled Dev Hub in a Developer Edition org, or have a trial Dev Hub org.
See Scratch Org Configuration Values for the complete list of supported features. For certain features, such as ApexMaxSize and MaxCustomLabels, you can optionally specify a limit.