Product context. I work on a trackpad with a fast cursor speed, so my finger almost never leaves the middle. The edges just stay unused. At the same time, the things I do most often, like taking a screenshot, hiding an app's interface or turning on x-ray mode, were all keyboard shortcuts. Some need four keys at once, and some can't be changed because the app doesn't allow it.

So I moved the shortcuts to the edges of the trackpad. The hand stays where it is.

Solution. Perimeter shows your trackpad in the middle of the screen with points along the edges. Pick a point, press + and add an action: give it a name, choose a trigger (tap, click, force click, swipe or a drawn gesture), then click the shortcut field and press the real combination. Press ⌘⇧4, and this point now takes screenshots. It works with any shortcut, even the ones an app won't let you change.

One point can hold several actions with different triggers. Profiles switch on their own when you change apps, so the same point can do one thing in Figma and another in Safari. An action can also be pinned to all profiles: set it once, and it works the same everywhere.

Fit. Hands are different, so the settings are about fitting the app to yours. Dot size and edge inset change how big each point is and how much of the trackpad it takes. Each side can have its own number of dots, or none. Swipe distance and haptic feedback can be tuned too. All points sit a little away from the edge, so they don't get in the way of macOS gestures.

Restraint. The biggest risk with a utility like this is adding too much. Every new trigger, mode or switch makes it harder to understand. I stopped at points, actions, profiles and the settings that fit them to the hand. Everything else stayed out.