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The button is for two settings, one if you want to fast scroll and the other is for a specified amount of lines and clicks each time you scroll.
Sorry, there was a problem. Please try again later.It unlocks the scroll wheel, so that it can spin freely. Useful for scrolling on longer pages, long PDFs, etc. with ease!
Sorry, there was a problem. Please try again later.MINE IS LENOVO 600 BT SILENT MOUSE IN THE MANUAL, IT IS MENTIONED THAT THE SMALL BUTTON BELOW THE SCROLL WHEEL IS FOR DPI. ONE PRESS IS 800 DPI, PRESSING TWO TIMES IS 1600 DPI AND PRESSING THREE TIMES WILL CHANGE TO 2400 DPI.
Sorry, there was a problem. Please try again later.It's the smooth fast scroll. If you have a really long website that you are on and you want to get to the bottom, click on that button and the mouse scrolls really fast.
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