What software can I use to customize the MX Master 3S?
The MX Master 3S is compatible with Logi Options+ software, which is optional and available for Windows and macOS. Logi Options+ includes Logitech Flow functionality and allows you to customize 7 buttons and use predefined profiles for popular business apps. IT admins can also use Logi Options+ to centrally define software settings and push them to Windows and macOS systems. (Pages 1–2)
From the official Logitech MX Master 3S Wireless Mouse manual, page 2
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