How to Use Mail Side by Side on iPad (Split View)
The short answer
To run Mail beside another app on iPad, drag a second app from the Dock onto the screen edge to activate Split View. To open two emails at once, drag Mail itself into both halves or use Stage Manager on a supported iPad. Compose windows can open separately via the expand icon without leaving the inbox.
How to use Mail side by side on iPad: open Split View, use Stage Manager, compose in a separate window, and drag emails between apps.
On this page
- 01The short answer
- 02Before you start: three modes and one built-in layout
- 03How to open Mail in Split View on iPad
- 04How to open a compose window separately and drag emails between apps
- 05iPadOS multitasking modes compared
- 06What to do when Split View is not working
- 07A faster way to handle a full inbox on iPad
Knowing how to use Mail side by side on iPad is the difference between an iPad that acts like a large iPhone and one that handles the kind of parallel work you would otherwise need a laptop for. The screen is wide enough to keep an email thread on one side and a reference document, calendar, or notes window on the other — but that layout does not appear automatically.
iPadOS supports three multitasking modes — Split View, Slide Over, and Stage Manager — and Mail also has a native three-column landscape layout that is independent of all of them. This guide covers each mode, gives step-by-step instructions verified on iPadOS 17 and iPadOS 26, explains how to open a compose window separately, how to drag a message into another app, and what to do when Split View will not activate.
The short answer#
To open Mail side by side with another app, use Split View: open Mail, tap the three-dot multitasking button at the top center of the screen, choose the Split View icon (two equal rectangles), and Mail will slide to one side. Tap the second app from the Home Screen to fill the other half. Drag the divider line between them to resize each panel.
To open two email conversations at once, touch and hold a message in the inbox until it lifts, then choose Open in New Window. This creates a second Mail window you can arrange alongside the first in Split View, giving you two independent mail sessions — different inboxes, different accounts, or two messages from the same thread — both fully interactive.
On iPads with an M1 chip or later running iPadOS 16 or newer, Stage Manager is an alternative. It lets you position Mail as a freely resizable floating window rather than snapping it to a fixed split.
Before you start: three modes and one built-in layout#
Split View is the standard two-app side-by-side layout where each app occupies a fixed share of the display. Slide Over is a narrower floating panel that hovers over another full-screen app and can be swiped in or out from the right edge. Stage Manager is a desktop-style window manager where apps appear as overlapping, resizable windows; it also supports connecting an external display on supported models.
Mail's three-column landscape layout is a fourth option that is separate from all three multitasking modes. Rotate the iPad to landscape and Mail automatically shows the mailbox sidebar, message list, and open message as three distinct columns. No setup required. It does not let you read two emails independently — for that you need two Mail windows in Split View or Stage Manager.
Stage Manager requires Apple Silicon
How to open Mail in Split View on iPad#
- 1
Open Mail
Mail must be the active foreground app before you trigger Split View. Tap the Mail icon from the Home Screen or Dock. These steps were verified on iPadOS 17 and iPadOS 26.
- 2
Tap the three-dot multitasking button
A small row of three dots appears at the very top center of the Mail window. Tap it to open the multitasking menu. This button was introduced in iPadOS 15 and is present on all supported iPads running that version or later.
- 3
Choose the Split View icon
Three layout icons appear: Full Screen (one rectangle), Split View (two side-by-side rectangles), and Slide Over (one full rectangle with a narrow panel). Tap Split View. Mail slides to one side of the screen and the Home Screen appears in the remaining space.
- 4
Pick the second app from the Home Screen
Tap any app icon on the Home Screen or in the Dock. It opens in the empty half. If the app is not visible, swipe through the Home Screen pages or type in the search field that appears. Both apps are now active in Split View.
- 5
Resize the panels by dragging the divider
A thin vertical divider sits between the two apps. Drag it left or right to redistribute screen space. On most iPad models you can reach an equal split or a roughly one-third / two-thirds arrangement. Release to lock the proportion in place.
- 6
Swap the second app without closing Split View
To replace one panel while keeping the other intact, tap the three-dot button on the app you want to replace and choose Full Screen or Close Window, then open a new second app. Or swipe up slowly from the bottom edge of the panel you want to replace to reveal the Dock, then drag a Dock icon into that panel.
How to open a compose window separately and drag emails between apps#
To open a compose window without leaving your inbox, touch and hold the compose icon (pencil on a square, bottom right of the Mail toolbar) for about one second until a pop-up appears, then tap Open in New Window. The compose view opens as a floating panel above the inbox. Tap the expand icon inside the compose panel to turn it into a full window, then use that window's three-dot button to place it in Split View beside your inbox.
To drag a message from Mail into another app — Notes, a task manager, a calendar — touch and hold any message in the list until it lifts and tracks your finger. Without releasing, use a second finger to navigate to the destination app (tap it in an already-open Split View, or swipe up to the Dock and open a different app while the first finger keeps the message lifted). Once the destination is visible, drag the message over it and release when the drop zone highlights. The message lands as quoted text in Notes or a linked item in compatible task apps; the original stays in Mail.
iPadOS 13 or later is required for Open in New Window
iPadOS multitasking modes compared#
The table below maps each mode to the iPadOS version it requires, which iPad models support it, and what it specifically offers for Mail workflows.
| Mode | iPadOS required | Supported models | What it gives Mail |
|---|---|---|---|
| Three-column layout | iPadOS 14 or later | All iPad models, landscape only | Mailbox list, message list, and open message visible together. Built into Mail — no multitasking needed. Cannot show two independent message views. |
| Split View | iPadOS 15+ (three-dot method); iPadOS 9+ (Dock drag method) | All modern iPad models | Two apps share the screen in fixed proportions. Each side can be an independent Mail window. Best for document-alongside-email workflows. |
| Slide Over | iPadOS 9 or later | All models that support Split View | Mail appears as a narrow floating panel over another full-screen app. Useful for quick replies without switching away from what is open. |
| Stage Manager | iPadOS 16 or later | M1 or later: iPad Pro 11-inch 3rd gen+, iPad Pro 12.9-inch 5th gen+, iPad Air 5th gen+ | Mail opens as a resizable, freely positioned window. Multiple windows can overlap. Preserves window arrangements across lock and unlock cycles. |
What to do when Split View is not working#
Most Split View problems with Mail fall into a handful of known causes. The table below covers the issues that come up most often.
| Problem | Why it happens | Fix |
|---|---|---|
| The three-dot multitasking button does not appear on Mail | The iPad is running iPadOS 14 or earlier, which lacks the three-dot button. Stage Manager being active changes the button's appearance but does not remove it. | On iPadOS 14 and earlier, initiate Split View by dragging the Mail icon from the Dock to the left or right screen edge while another app is already open. On iPadOS 15 or later with Stage Manager active, the three-dot button is still present at the top of the window. |
| Only Full Screen and Slide Over appear — no Split View icon | The second app does not support Split View. A small number of third-party apps disable it, and Split View is unavailable when the iPad is in a specific accessibility mode. | Try a different second app to confirm Mail is not the cause. Mail itself always supports Split View. If the icon is missing regardless of the second app, check Settings > Accessibility > Guided Access and ensure it is off. |
| Mail disappears to the background instead of sliding to the side | The Home Screen appeared after tapping the Split View icon but no second app was selected, so Mail returned to the background after a timeout. | Tap the three-dot button on the Mail window again and retry. After choosing Split View, tap the second app promptly — there is no timer shown, but a long pause causes Mail to return to full screen. |
| The divider between two apps cannot be moved | Some apps enforce a minimum or maximum width. Mail itself has no width restriction, so if the divider is locked, the other app is the cause. | Replace the second app with a different one and test whether the divider moves. If it does, the width restriction belongs to the original second app and cannot be overridden. |
| Split View closes when the iPad locks or goes idle | Expected behaviour on most iPad models. iPadOS returns to a single full-screen app when the display sleeps. | Return to Split View after unlocking by using the three-dot button again. Stage Manager on supported iPads preserves window arrangements more reliably across lock cycles. |
| Stage Manager is missing from Control Center | The iPad uses a chip older than M1 and does not support Stage Manager. The toggle is absent because the feature is not available on that hardware. | Check the iPad model and chip under Settings > General > About. If it predates M1, Split View is the correct side-by-side option. |
A faster way to handle a full inbox on iPad#
Split View makes the iPad a capable email workstation — you can keep Mail open beside a document, take notes while you read, and cross-reference details without switching apps. The bottleneck that remains is the mail itself: every message still needs a decision, and the replies that matter still take time to write.
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Written by
Nafiul HasanNafiul Hasan is an entrepreneur and AI automation system builder with 10+ years of experience turning messy, manual workflows into reliable automated systems. He designs and ships AI enterprise solutions end-to-end — the agent logic, the data plumbing, and the product people actually use — and founded AI Emaily to give busy professionals their attention back. He writes here from the builder's seat: what works, what breaks, and how to put AI to work without giving up control.