Cannot open opera dragonfly

I am trying to debug some code in Opera 12.15, but it makes references to menu and commands that do not appear on my screen. I want to open Opera Dragonfly but cannot figure out how to do it.

There are a number of ways to open Opera Dragonfly:

Shortcut:

• Mac: CMD+alt+I
• Win/Linux: ctrl+shift+I

Menu item:

• Mac: Tools → Advanced → Opera Dragonfly
• Win/Linux: Click on the Opera menu in the upper-left-hand corner of the Opera browser interface and select Page → Developer Tools → Opera Dragonfly

Open Dragonfly with the element you want to inspect in focus:

• Right click, select Inspect Element.

For more information - documentation.