How can I add my own class name in wordpress site?

Question

I was working with a site. The site has 3 div ie 3 containers. The 2nd container has the colored body, so I want to toggle with the border radius. but the by default class of WordPress are repetitive. So, It is becoming difficult to work only with 2nd container.

So, I am thinking to add my own extra class to the 2nd div. To perform this need help:) M working with elementor pro

Answer 1

I cleared my browser cache and the option of adding own class and Id is now visible in advance tab.