On a fresh new line, type exactly as written:

Add the following three lines exactly as shown:

The console, also known as the developer console, is a command-line interface that allows players to input specific commands to modify game settings, enable developer tools, and even access cheats. Enabling the console provides players with more control over their gameplay experience, allowing them to customize settings, such as graphics and audio, and troubleshoot issues. Additionally, the console can be used to access various developer tools, which can be useful for content creators, streamers, and competitive players.

Some common console commands in Call of Duty: Modern Warfare 3 include:

Before diving into the "how," let's look at the "why." Enabling the console in MW3 gives you access to: