1. Login to WordPress Admin
  2. From WordPress Admin, click on Pages -> Add New

    pages add new

  3. Enter title About Us and keep the body empty or write something identical and Publish the page.

    page homepage

  4. Click on Appearance -> Menus and create a menu item for this About Us page

    global click appearance menu

  5. From the WordPress Admin, click on WT THEME_NAME Theme

    global click theme

  6. Select Page - About Us outline

    outline select home page

  7. Click Assignments under Page - About Us outline
  8. Enable About Us page you just crated under Pages section and Save Assignment

    layout home page

  9. Click Layout under Page - About Us outline

    search options

  10. Now scroll down, follow on-screen instructions and add/edit contents as you need.