The enhanced profile user interface provides a streamlined experience for managing profiles. You can easily navigate, search, and modify settings for a profile. Salesforce org can use one profile user interface at a time.

To enable and disable enhanced profile user interface in Salesforce, check the below link

https://www.infallibletechie.com/2013/08/how-to-enable-and-disable-enhanced.html


Enhanced Profile User Interface enabled

Enhanced Profile User Interface disabled