HOW TO Use and create Guides
Build a new gesture
Select Global on the left and click Add New Gesture. In the pop–up, choose Five And More Finger Gestures > 5 Finger Swipe Left. In Predefined Action, choose Window Resize & Move > Maximize Window Left.
Test your gesture
Switch to Finder and open a new window, then perform your gesture. The window should immediately snap to the left. (Some apps have minimum window widths, which may take up more space.)
Practice gestures
If you find it hard to consistently trigger a gesture, click Show Live View (bottom–left). This shows the positions of your fingers on the trackpad. Perform gestures and it’ll state what action they trigger.