
Designed with muscle memory in mind, thumb buttons-the wheel, forward and back buttons- are all vertically stacked above where the thumb’s rest. Physically, the MX Master 3 stands out from its predecessor, with a new button layout and revamped thumb rest aimed at making usage more comfortable and intuitive. Freespin rapidly took me past many pages until I reached the section I wanted, and when I placed my finger back on the wheel, I could make more precise scrolls to home in on the paragraph I wanted.

SmartShift is very helpful when scrolling through long documents, PDFs or spreadsheets. You can toggle between Ratchet or Freespin mode by hitting the button underneath the scroll wheel or use SmartShift (activated in the software), which adjusts the mode based on how you move the wheel. the wheel’s gears aren’t actually touching anything, so Logitech told me it expects the mouse to have a longer lifespan than predecessors, (but Logitech didn’t increase the warranty period).
