Redwood Look and Feel in User Interface Components
The Oracle Redwood Look and Feel (LAF) for Oracle Application Framework incorporates new colors, fonts, sizes, and component styles, including button styling and error message displays, all designed to optimize the user experience. Starting in Release 12.2.15, Redwood is the default LAF for Oracle Application Framework, with the Oracle Applications Look and Feel (APPS_LOOK_AND_FEEL) profile option set to "Redwood" by default.
Steps to Enable
You don't need to do anything to enable this feature.