Bind the Middle Mouse Button to Dragging the Screenflow Timeline Using Karabiner

Instructor: [0:00] My other main scenario is dragging the timeline around, which can be accomplished by dragging the slider, or by clicking over here, hitting hand, and dragging it. Then you'd have to go back to A to select and edit.

[0:13] I like to keep my mouse right in this area, so hitting H and then A seems to be the best solution for that, but that's a couple more keys than I want to hit. So, in Karabiner, let's set up a rule where I want to hit the pointer key of Button 3, which is also known as the middle mouse button.

[0:33] I want to map that to a sequence of hitting the H key to switch to hand, and then the pointer key of Button 1, or left-click. Then this won't have any conditions, so I can put nil, but in my config I have a variable which lets me disable and enable these sorts of shortcuts, which I call through. I'll just say, when it's not through.

[0:51] Then, finally, after up allows me to switch it back to the key of A, meaning back to the arrow mode. Now when I switch back to ScreenFlow, and I middle-click, I can just drag it around. I middle-click, drag, middle-click, drag, middle-click, drag.

[1:07] You can see it switching from the hand to the arrow, hand to the arrow, and allowing me to interact with the timeline in the exact way that I want.