A second monitor doubles your space. It doesn't change what happens when you maximize something: that window fills the whole screen it's on, and whatever you had parked there goes under it. Always On Dock reserves a strip on each of your two screens, through Windows itself, so both stay claimed no matter what you open next.
Most people buy the second screen for exactly this reason — somewhere to keep the chat, the spec, the inbox or the dashboard permanently in view. It works right up until you start using that screen for work too.
Maximize a browser on monitor two and it fills monitor two. The reference you parked there is now behind it, and you're back to alt-tabbing — just on a bigger desk. More screens multiply the space, not the rule about maximizing.
Snapping two windows side by side on a screen holds until one gets maximized. Pinning a window always-on-top keeps it visible but floats it over the work underneath. Neither gives you space that stays yours.
Reserving the space is the difference. Always On Dock registers a strip on each screen through the Windows AppBar system — the same mechanism the taskbar uses. Windows marks that strip unavailable on that display, so maximized windows there stop at its edge. Nothing floats, nothing overlaps, and the split can't collapse.
The two docks aren't one setting applied twice. Each is measured against its own display and remembers its own state, which is what makes a mismatched pair — the usual laptop-plus-external case — work properly.
Drag one wider and the other doesn't move. A narrow strip on a laptop panel and a wide one on a 27-inch external stay that way, and both return at the next sign-in.
Plenty of people want the dock only on the secondary and the main screen left completely clear. One click on that screen's numbered tile turns it on or off.
A 4K monitor beside a 1080p laptop panel is the normal case, not the edge case. Each dock is per-monitor DPI aware, so neither strip comes out the wrong size.
Each dock holds up to three windows, split vertically and reorderable by dragging — six permanently visible windows across a dual monitor setup.
Undock the laptop and the external's docked windows are restored onto the screen that's left, clamped to fit it — not stranded off-desktop at a size nothing can display.
Plug the second monitor back in and its dock returns at the width you set. A screen that's still waking up when you sign in is picked up as soon as it appears.
Almost every two-screen desk is one of these, and the reserved strip earns its place differently in each.
The external gets the work — editor, spreadsheet, design tool — maximized and undisturbed. The laptop screen, which is smaller and usually the one you glance at, carries chat, notes and a to-do list in a strip that nothing on that screen can cover.
The primary keeps a narrow strip for the one reference you check constantly. The secondary keeps a wider one for the things you monitor — inbox, dashboards, a build pipeline — while still leaving room to maximize something beside them.
Running three screens instead? The same per-screen docks scale up — tested with up to three. See reserving space across multiple monitors for the three-screen layouts and how the numbered tiles map to Windows' own display numbers.
| Snap on each screen | Always on top | Reserved space | |
|---|---|---|---|
| Keeps a window visible on screen two | Until you maximize | Yes | Yes |
| Survives maximizing on that screen | No — the layout collapses | Yes | Yes |
| Covers the work underneath | No | Yes — that's how it works | No |
| Different setting per monitor | Re-arranged by hand each time | Per window, not per screen | Yes — width and on/off per screen |
| Survives sign-out and reconnecting | No | No | Yes, restored per monitor |
| Jump focus back with a shortcut | No | No | Ctrl+Alt+F |
If you only ever want two windows beside each other for a moment, Snap is free and already installed. Reserved space is for the window you want visible all day, on either screen, without thinking about it again. The split screen page covers the mechanism itself in more detail.
Jump focus to the last dock you used — no hunting across two screens for the window you want to type into.
Restore your docked windows, including bringing them back after Show Desktop has cleared both screens.
Launch your chosen program straight into a dock instead of opening it and dragging it across.
Yes. Each screen you enable gets its own independent dock with its own remembered width. A dual monitor setup can run a reserved strip on both screens, on just one, or on neither.
Because each screen behaves like a screen. Maximize a browser or editor on your second monitor and it fills that whole display, covering whatever you parked there. More screens multiply the space, not the rule about maximizing.
Yes — docks are enabled per screen in any combination, and the numbered tiles in the quick launch bar toggle each one with a single click.
Yes, and it's the most common dual screen setup. Each display keeps its own dock width, so a narrow strip on the laptop panel and a wider one on the external both come back the way you set them.
That screen's dock is removed and its windows are restored onto the screen that remains, with size and position clamped to fit. Reconnect it and the dock returns at its remembered width.
No. Each dock is measured against its own display and is per-monitor DPI aware, so a 4K screen beside a 1080p laptop panel each get a correctly sized strip.
The same per-screen docks apply, tested with up to three. See multiple monitors.
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