Features · Free

Snap areas

Drag a window by its title bar to an edge or corner of the screen, and it snaps there.

Drag to the left edge, see the footprint, let go.

Snap a window by dragging

Drag a window by its title bar to an edge or corner of the screen. A footprint shows where it will go.
Let go. The window snaps to the footprint.

To drop it normally, move away from the edge before you let go.

Default snap areas

Landscape displays (wider than tall) use these areas.

Where you drop it	What happens
Top edge	Maximize
Left edge	Left Half
Right edge	Right Half
Top-left corner	Top Left
Top-right corner	Top Right
Bottom-left corner	Bottom Left
Bottom-right corner	Bottom Right
Bottom edge, left third	First Third
Bottom edge, middle third	Center Third
Bottom edge, right third	Last Third

A corner is the first 150 px of each edge next to it, and wins over the edge.

Portrait displays

Displays taller than they are wide have their own set.

Where you drop it	What happens
Top edge	Maximize
Top-left, top-right, bottom-left, bottom-right corner	The matching quarter
Left or right edge, upper half	Top Half
Left or right edge, lower half	Bottom Half
Bottom edge, left half	Left Half
Bottom edge, right half	Right Half

Each display uses the set that fits its own shape.

With more than one display

An edge that touches another display snaps only when you pause the pointer at it. Sweeping across does not snap.
Corners snap right away, even on a shared edge.
To make shared edges snap at once or never, set advanced.snap_shared_edges to "always" or "never" in the config file.

Change what an area does

Open Settings → Snap Areas.
Under Landscape snap areas or Portrait snap areas, click the button next to an area on the picture of the display.
Pick an action, such as one of your custom sizes, or Nothing to turn that area off.
Click Save.

Drag a snapped window away

A window you snapped by dragging gets its earlier size back when you drag it away.

If you moved or resized it since the snap, it keeps its size.
To keep the snapped size, untick Restore window size when unsnapped.

Snap Areas settings

Snap windows by dragging snap.enabled: Default: on. Turns drag-to-snap on or off.
Stretch to full height when resizing to the top or bottom snap.resize_fills_height: Default: on. Drag a top or bottom border to the screen edge to fill the full height, keeping the width.
Restore window size when unsnapped snap.restore_on_unsnap: Default: on. A snapped window you drag away gets its earlier size back.
Animate footprint gesture.animate_footprint: Default: on. The footprint slides instead of jumping, here and for throws.
Landscape snap areas [snap.zones]: Default: as in the landscape table.
Portrait snap areas [snap.portrait_zones]: Default: as in the portrait table.
Edge trigger distance (px) snap.edge_margin: Default: 48. Range 1 to 100. How near the edge (or the top of the taskbar) the pointer must be.
Corner size (px) snap.corner_size: Default: 150. Range 10 to 1000. How far each corner area reaches along its two edges.
Require modifiers (Pro) snap.require_modifiers: Default: none (always snaps). Snap areas, snap targets and the snap panel react only while you hold these keys (and an optional Record key).
Footprint color (Pro) snap.footprint_color: Default: Follow the accent color. Untick it to give the footprint and snap target rings their own color.
Footprint opacity (Pro) snap.footprint_alpha: Default: 35 %. From invisible to solid; the outline always stays visible.
Draw a lighter border around the footprint (Pro) snap.footprint_border: Default: on. A thin outline so the footprint shows on any background.

Tips

Snapped windows keep the gaps between windows and at the screen edges.
While a window is pinned, snap areas on that display fill the space beside it.
Snapping to a custom size never runs its “Then” action.