Drag a window until the pointer reaches a screen edge or corner. An outline appears showing where the window will land. Release inside it and the window takes that position. No shortcut, no configuration, and the zones cover more positions than the ones macOS provides on its own.
How the zones are laid out
The map follows the layouts themselves. Left and right edges produce halves. Corners produce quarters. The top edge fills the display. On a wide screen the horizontal edges are subdivided further, so a drop near the middle of an edge and a drop near its end give different results.
What matters mechanically is the pointer, not the window. The zone triggers when the cursor enters it, which is why a window that looks nowhere near an edge still snaps — the pointer got there first. Dragging by a title bar far from the window’s own edge is the usual explanation for a snap that seems to fire early.
The outline is the whole interface
The preview outline does two jobs. It confirms a zone is active, and it shows the exact frame the window will take. Both matter because the alternative is dropping a window and finding out afterwards.
Release the mouse while no outline is showing and nothing snaps at all — the window simply lands where it was dropped. That single behaviour explains most reports of snapping being unreliable. The zone was never entered, the release happened a few pixels early, and the feature did exactly what it was designed to do.
The practical habit is to watch the outline rather than the window. Once you trust it, dragging becomes as precise as a shortcut.
Turning individual areas off
Not everyone wants every zone. The top edge in particular catches people who drag windows upward to reach a menu, and a fill they did not ask for is an annoyance rather than a convenience.
Individual areas can be disabled in the settings pane, and the whole feature can be switched off while keyboard shortcuts continue to work. The two systems are independent, which is worth knowing before uninstalling anything: disliking the drag behaviour is not a reason to abandon the Rectangle app entirely.
Multi-display setups deserve a look here too. Zones exist on every connected screen, including the internal edges where two displays meet, and those internal edges are the ones most likely to fire when you did not intend them to.
Why they compete with macOS
Recent macOS versions added drag-to-edge tiling of their own, listening for the same gesture at the same screen edges. Two systems watching one drag produce one of three outcomes: the system wins, the app wins, or the result alternates unpredictably between them.
The symptom is easy to recognise. A drag that produces the wrong shape, or a highlight that does not look like the one you expect, means both are active. The fix is to pick one: turn the native option off in System Settings → Desktop & Dock and let Rectangle window snapping own the gesture, or leave the system in charge and disable the app’s zones instead.
Keyboard shortcuts are unaffected by any of this. They set window frames directly rather than listening for drags, which is why a setup where the mouse behaves oddly and the shortcuts work perfectly is entirely normal.
Trackpad users hit one extra wrinkle. A drag held with a resting thumb can end early if the click releases without the hand noticing, dropping the window a moment before it reaches the zone. Anyone seeing intermittent snapping on a laptop should try the same drag with tap-to-click disabled before blaming the software.
When dragging beats a shortcut
Neither approach is the correct one, and most people settle into a mix without deciding to. The pattern that emerges is simple enough to state: if the hand is already on the trackpad, drag. If it is on the keyboard, press keys.
Dragging also wins when the destination is unclear. Choosing between a half and a two-thirds layout by eye, watching the outline change as the pointer moves, is faster than pressing a shortcut twice to cycle sizes. Setup notes for Apple silicon and Intel machines are on the Rectangle Mac site, and the download is a disk image from the official Rectangle site.
Frequently asked questions
Do snap areas work without the Accessibility permission?
No. Every window movement, whether triggered by a drag or a keystroke, requires the same permission, because both amount to one application repositioning another’s window.
Can I snap a window to a specific zone by dragging on a second monitor?
Yes, each display carries its own set of zones. The edges where two screens meet are the ones to watch, since a drag across the boundary passes through them on its way.
Why does nothing happen when I drop a window at the edge?
Almost always because no outline was showing at the moment of release. Drag slightly further, wait for the preview, then let go. If the outline never appears, the feature or the permission is off rather than broken.
