Adding this annotation to an @Configuration class imports the Spring MVC configuration from WebMvcConfigurationSupport, e.g.:

@Configuration
@EnableWebMvc
@ComponentScan(basePackageClasses = MyConfiguration.class)
public class MyConfiguration {
}

To customize the imported configuration, implement the interface WebMvcConfigurer and override individual methods, e.g.:

@Configuration
@EnableWebMvc
@ComponentScan(basePackageClasses = MyConfiguration.class)
public class MyConfiguration implements WebMvcConfigurer {

    @Override
    public void addFormatters(FormatterRegistry formatterRegistry) {
        formatterRegistry.addConverter(new MyConverter());
    }

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(new MyHttpMessageConverter());
    }

}

If WebMvcConfigurer does not expose some more advanced setting that needs to be configured, consider removing the @EnableWebMvc annotation and extending directly from WebMvcConfigurationSupport or DelegatingWebMvcConfiguration, e.g.:

@Configuration
@ComponentScan(basePackageClasses = { MyConfiguration.class })
public class MyConfiguration extends WebMvcConfigurationSupport {

    @Override
    public void addFormatters(FormatterRegistry formatterRegistry) {
        formatterRegistry.addConverter(new MyConverter());
    }

    @Bean
    public RequestMappingHandlerAdapter requestMappingHandlerAdapter() {
        // Create or delegate to "super" to create and
        // customize properties of RequestMappingHandlerAdapter
    }
}