iCUE & Lighting
You can plug in the mouse and use it without any software, but if you want to configure it you’ll need to download Corsair’s iCUE software. Opening up iCUE you should see the Katar Pro XT listed under your devices. Once you click into it the first tab on your left will be Actions. Here you can reprogram all of the six buttons on the mouse. You can select a macro, text, media control, launch an application, set a timer, disable the button, switch profiles, and remap to any other mouse button or keyboard button.
The next tab is Lighting Effects, here you can select the lighting effect for the only lighting zone on the mouse, which happens to be the scroll wheel. There are quite a few different lighting effects to choose from. The next tab is hardware lighting which sets a lighting effect if you are not running iCUE. You only have the options for a static color or Rainbow.
The lighting on the scroll wheel looks pretty good.
Moving on the next tab is DPI. Here you can set three different DPI levels as well as a Sniper DPI level. You can also set a color for each level, the lighting on the scroll wheel will indicate which DPI level you are on.
Under the Performance tab you can enable enhanced pointer precision and set the pointer speed.
The last tab is Surface Calibration. Here you can calibrate the Katar Pro XT to your gaming surface, which I would highly recommend doing.
Clicking on settings at the top of iCUE we can set our polling rate, brightness of the RGB lighting, and check for firmware updates.