Enable Smartshift; Switch Modes Manually - Logitech MX Master 2S User Manual

Logitech® MX Master 2S User Guide
Click-to-click (ratchet) mode — ideal for precise navigation of items and lists.
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Hyper-fast (freespin) mode — near-frictionless spinning, letting you fly through long
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documents and web pages.

Enable SmartShift

Select Enable from the SmartShift pull-down menu on the Point and scroll tab.
Turn off SmartShift by selecting Disable from the SmartShift pull-down menu.
When SmartShift is disabled, spinning or braking the scroll wheel has no effect on the current
scrolling mode.

Switch modes manually

Whether SmartShift is enabled or disabled, you can manually switch between modes by pressing
the mode shift button.