There is a site option that you can disable, which will hide the PageWrapper while you are editing your PageBuilder page. Any Site Administrator has access to adjust this site option. Follow the steps below to disable this.
  1. Go to Setup > select Site Options
  2. Click Go next to the Dropdown menu
  3. Do a keyword search on this page for CONTENT_EDIT_WITH_WRAPPER
  4. Replace the current value with FALSE and Save