Answer: Snap Layouts does not guarantee persistence across monitor reconnections, but it offers more repeatable placement for complex zones; Snap Assist can add friction when you need specific non‑standard layouts or manage many windows.
Confirmed facts
- Snap Layouts appears as a hover‑over menu at the maximize button and adapts its grid to the current monitor’s resolution and scaling (Windows 11 22H2+).
- Snap Assist is triggered by dragging a window to an edge or using Win+Arrow; it always offers the same half/quarter/full‑screen options unless the window is manually resized.
- Both features are session‑based; Windows does not store snap positions after a monitor is disconnected and reconnected.
- On ultra‑wide or 4K displays, Snap Layouts can show wider columns or extra rows, while Snap Assist defaults to the standard 2×2 or side‑by‑side grid.
Likely explanation
Because Snap Layouts lets you choose a predefined zone each time you need it, you can reproduce the same complex arrangement (e.g., three‑column on a 3440×1440 ultra‑wide plus a secondary 1080p screen) by simply invoking the menu again. Snap Assist, however, fills the remaining space based on the current Z‑order of windows, which can place an unintended application in a slot when you have more than four active windows or when you need a layout that isn’t half/quarter/full.
Steps to verify persistence for your workflow
- Open the applications you want to group on each monitor.
- Hover over a window’s maximize button and select the desired Snap Layout (e.g., three‑column).
- Note the window positions.
- Disconnect the secondary monitor (or change its resolution/scaling).
- Reconnect the monitor and restore its original settings.
- Repeat step 2 on each monitor and observe whether the windows return to the same zones.
If the windows do not return to the exact zones, the feature lacks persistence; you would need to re‑apply the layout manually.
When Snap Assist adds friction
- Managing >4 windows where you need a specific non‑standard split (e.g., 1/3 + 2/3).
- Working across monitors with different DPI scaling; Snap Assist’s fixed grid may misalign windows.
- When the Z‑order places a low‑priority window in a desired slot, forcing you to dismiss or re‑snap.
Missing diagnostic detail
To confirm whether Snap Layouts is available on your system, please provide the Windows 11 version/build number (e.g., 22H2, 23H2). If the version is older than 22H2, Snap Layouts will not be present and Snap Assist will be the only option.
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