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To change CPI levels you must use the new and improved version of the LCD that debuted on the Ikari and is situated on the under side of the mouse. While on the Ikari this simply displayed the CPI setting you were currently on and let you adjust it by holding down the middle button and rolling the scroll wheel. This new version enables you to control almost every aspect of the mouse.
To activate the LCD, you hold down the middle button until the menu appears. From here you can select (by rolling the scroll wheel) from 5 different profiles, save your changes, load the default settings, or exit the menu. Go into a profile (by pressing the scroll wheel button) and you can select whether to use that profile or change one of the ExactSense, ExactRate, FreeMove, ExactAim, and ExactAccel settings for that profile.
ExactSense refers to the CPI settings while ExactRate lets you choose the polling rate of the mouse, which is adjustable from 125Hz to 1,000Hz. Polling rate is the frequency with which the mouse reports movements to the computer and, according to SS, synchronising it with a multiple of the lower of either your game or monitor refresh rate gives a smoother response. So, for instance, if your monitor refresh rate is 60Hz, you set the rate to 600Hz, or 960Hz, or some other multiple of 60. We must admit to being unable to detect the difference this made to our gaming but the options there for you to play with should you need it.
FreeMove let's you adjust the path correction applied by mice. This is a technique used to help keep the pointer moving in a straight line when the computer predicts that's what you're trying to do. This is useful in everyday computing where you may want to draw perfectly horizontal or vertical lines but while gaming it can seriously affect your accuracy. The Xai lets you adjust the level to which path correction is applied with an arbitrary scale of 0 to 10.