What is the 4x and 16x mouse sensitivity thing?

[[UFP]Ghost]

I don't really understand what is it. Could someone enlighten me?

[KRD]

As you hold the shift key or the middle mouse button down, the speed at which the view moves around is 4 times greater. If you hold both the keys down at the same time, it's 16 times greater.

Pretty handy for larger maps.

[franpa]

is it possible to have 4x mouse speed always on except when someone emulates 1.5 speed?

i find the extra responiveness to feel better.

[bonz]

is it possible to have 4x mouse speed always on
Plug a toothpick or a small coin between your keys.

[CyberShadow]

Or just turn up your Windows' mouse sensitivity, hehe.
Maybe there'll be a scroll sensitivity setting in the future.