google/bing for Logitech Set Point software for your trackball download and install (yes it does support windows 10). once installed, you can set up the various functions on the trackball using the Logitech software.
With Windows10, finding the Logitech interface might prove difficult for some...(once installed).
1. Open the old/traditional "Control Panel", select mouse, then you should see a tab for SetPoint settings. (right click windows logo, select control panel)
Optional way
1. go to windows 10 settings, select devices, then mouse & touchpad, then scroll down for additional settings, then find the tab SetPoint settings..