Can I DevTools?
  1. In the devtools, open the Command Menu using, Cmd+Shift+P or Ctrl+Shift+P. Search for "Show 3D View" and press Enter.
  2. This will open the 3D View drawer next to the Console. For developers, it is useful to visualise a web page in three dimensions to,
    • Find out how complex a web page is
    • Spot out-of-viewport elements
    • Debug z-index stacking issues
    • Debug performance issues with composite layers