I just looked at my Karabiner preferences on my Macbook, and it contains three entries:
1) fn + cursor key to Page Up/Page Down/Home/End.
Occasionally nice, but usually not necessary.
2) Option-R to right click
Slightly nicer than Ctrl-click, but not essential.
3) Caps Lock to left click
Absolutely essential and I can hardly live without it. Tap to click is fine on the touchpad, but "click to drag" was something I hated until I did this mapping. If you haven't already mapped Caps Lock to something else you can't live without, I would highly recommend trying this. You'll probably need Karabiner's partner program Seil to do it: (https://pqrs.org/osx/karabiner/seil.html.en)
Nice to know. I've had that on before, but because the "picture" shows moving a window, I hadn't known that it worked for all dragging options, including those with modifiers (like copying a file). I just tested, and it does. But I find the "left pinky" on Caps Lock to be more convenient than repositioning my right hand to do a 3-finger drag. And I use it for other clicks besides drags --- that was just one case I liked.
What I'd really like for 3-finger drag is the ability to move windows without having to click in the title-bar. That is, 3-finger drag anywhere within the window to reposition. Do you know if there is any way to enable this? Currently I use Better Touch Tool (another excellent configuration program) for Cmd-Option-Click-drag to reposition, but this sometimes interferes with certain applications.
1) fn + cursor key to Page Up/Page Down/Home/End.
Occasionally nice, but usually not necessary.
2) Option-R to right click
Slightly nicer than Ctrl-click, but not essential.
3) Caps Lock to left click
Absolutely essential and I can hardly live without it. Tap to click is fine on the touchpad, but "click to drag" was something I hated until I did this mapping. If you haven't already mapped Caps Lock to something else you can't live without, I would highly recommend trying this. You'll probably need Karabiner's partner program Seil to do it: (https://pqrs.org/osx/karabiner/seil.html.en)