Classic Universal Login Experience
The Classic Experience has extensive customization options available. After choosing one of the templates, you can modify them to meet your needs. The Lock widget, if used, has a variety of both appearance and behavior options that can be changed. The Auth0.js based templates have even more flexibility, as the UI is entirely custom made and can be modified to match your application's styles if you wish to do so.
Given that it is being used by a significant percentage of Auth0 customers, the Classic Universal Login Experience will be maintained for the foreseeable future. However, the majority of significant new feature development will be done on the New Universal Login Experience.
Implement Universal Login
For detailed instructions on setting up your application to use Universal Login, check out our Quickstart guides and choose the one that best fits your chosen technologies. The Quickstart guides will walk you through all of the implementation steps.