Click on Pages → All Pages in WordPress
You can view About Us. When the cursor hovers on the pages, then few options get displayed below About Us. There are two ways to edit the Post, i.e., Edit and Quick Edit.
Edit − Click on Edit option.
You can edit or change the content or title from the page as per your need, and then click on Update button as shown in the following screen.
Quick Edit − Click on Quick Edit option in About Us as shown in the following screen.
You can edit the Title, Slug and date of the About Us page and can also select the parent for your page as shown in the following shot and then click on Update button.