I use an Elecom Huge[1] trackball, it's got a few extra buttons that I've mapped with SteerMouse[2] (excellent MacOS Mouse Driver tool) and BetterTouchTool[3] o

I use an Elecom Huge[1] trackball, it's got a few extra buttons that I've mapped with SteerMouse[2] (excellent MacOS Mouse Driver tool) and BetterTouchTool[3] on macOS to provide window and space management/switching: It has: Left click, Right Click, Scroll wheel press, scroll wheel tilt down, scroll wheel tilt up, back, forward, fn1 and fn2 by the wheel, and fn3 right next to the right click. - Scroll Wheel Press and Fn3: are set to middle click (for some reason, in my setup, fn3 can't always be the third mouse depending on context... it's annoying). - fn1: Expose - fn2: Application Expose - hold fn3 + tilt down: previous space - hold fn3 + tilt up: next space - back/forward: set to move backwards and forwards or swap tabs depending on the application (customized with BetterTouchTool per-app) - Bonus: Easy Move + Resize [4]: I hold my configured Hyper key (left control on my external keyboard, karabiner configured to be cmd+option+control+shift) and left-click to move, right-click to resize [1]: https://elecomus.com/web/product/3271/ https://elecomus.com/web/product/3271/ [2]: https://www.plentycom.jp/en/steermouse/ https://www.plentycom.jp/en/steermouse/ [3]: https://folivora.ai/ https://folivora.ai/ [4]: https://github.com/dmarcotte/easy-move-resize https://github.com/dmarcotte/easy-move-resize