Enabling frames mode in Chrome Developer Tools

I was learning how to use chrome developer tools to improve performance and debug sites and stumbled on a video about it.
The video mentions frames mode which looked pretty useful but I was not able to find any reference to it anywhere on the internet.

Ref: https://youtu.be/0xx_dkv9DEY?t=319
Note: Video from 2014, uses an older version of chrome dev tools

  • Searching chrome dev tools documentation
  • Looking for the feature on forums ( stackoverflow, reddit )
  • Messing with the settings of chrome dev tools on my machine

I was expecting there to be an option to switch to frames mode.