What is tf2 borderless window?

TF2 borderless window is a feature that allows players to play the game in a windowed mode without any borders or edges. This feature is useful for many reasons, such as allowing players to easily switch between the game and other applications without having to minimize or switch windows. It also helps improve the overall gaming experience and performance by reducing the strain on the computer's graphics card. There are different ways to enable borderless window mode in TF2, including through the game's settings menu or by using third-party software.