By default, the thumbwheel is configured to scroll back and forth horizontally, such as in a multiple column view I have in place using the Hootsuite Web app, or within a spreadsheet. You may need to tweak the associated Options software to maximize the utility of the MX Master 2S horizontal thumbwheel.

The thumb rest is itself a large button, easily depressed by right-handers, but less so by lefties. Two thumb buttons provide “forward” and “back” navigation, though they’re configurable. But there’s also a small, free-spinning thumbwheel, ostensibly designed for horizontal scrolling. Two are narrow slivers of plastic, generally serving as “forward” and “backwards” shortcut keys for Web browsing. Logitech’s MX Master 2S clusters three buttons within reach of a right-hander’s thumb, on the left-hand side of the mouse. It’s the second (yes, second) mousewheel that you might find intriguing. Via Logitech’s Options software, you can also enable “SmartShift,” which automatically switches the scroll wheel from ratcheting to a free-spin mode depending on how quickly you spin it. Switching between the two is controlled by a small button mounted behind the thumbwheel, which is configurable.

As is becoming more common, a broad mousewheel can either spin freely or ratchet back and forth incrementally, especially useful for navigating menus. The “Logi” brand features prominently on the broad left- and right-hand buttons, cut with such distinctive gaps that I can’t help but wonder what sort of schmutz will work its way in over time. The MX Master 2 S opts for a gray-and-silver aesthetic. Though a USB dongle seems somewhat anachronistic in the age of Bluetooth, Logitech’s Unifying Receiver is still a superior solution for environments with lots of Bluetooth devices, or just an older PC.

Logitech button software