iPhone Duo split keyboard: how to enable on 7.8" inner + 5 alternatives

The iPhone Duo keyboard supports split mode, floating keyboard, cursor trackpad, and a full shortcut bar when the 7.8-inch inner display is open. iOS 27 inherits most keyboard features from iPadOS, including the 12 standard keyboard shortcuts that work across the inner display. When the cover display (5.4") is in use, the keyboard behaves like a standard iPhone keyboard — single, full-width, no split.

This FAQ covers the keyboard features unique to the iPhone Duo (split, floating, trackpad), the iOS 27 shortcuts that work best on the 7.8-inch display, and tips for one-handed typing on the cover display.

How does the iPhone Duo keyboard work on the inner display?

When the iPhone Duo is unfolded, the iOS 27 keyboard behaves like an iPad keyboard:

• Full QWERTY layout at native 7.8-inch size
• Numeric row above the QWERTY (toggleable)
• Predictive bar with emoji, GIF, voice, and dictation buttons
• Shortcut bar above the predictive bar (Command, Option, Tab, etc.)
• Two-finger swipe for cursor movement (trackpad mode)
• Three-finger swipe for undo / redo
• Floating keyboard (pinch gesture to detach and reposition)
• Split keyboard (long-press keyboard switcher → Split)

The Duo's 7.8-inch inner display is large enough to fit the full iPad-style keyboard without feeling cramped. Apple's keyboard density is similar to iPad mini.

How does the iPhone Duo keyboard work on the cover display?

When the Duo is closed, the keyboard reverts to standard iPhone behavior:

• Full QWERTY at 5.5-inch width — similar to iPhone 13 mini
• No numeric row (swipe up on letters to enter numbers, like older iPhones)
• No shortcut bar (standard iOS 27 predictive bar only)
• No split keyboard (screen too small)
• Trackpad mode (long-press spacebar) — yes, available

For users with smaller hands, the cover display keyboard is easier to type on than iPhone 18 Pro Max because the keys are closer together and one-handed reach is easier.

How do I split the iPhone Duo keyboard?

Long-press the keyboard switcher (globe icon) → tap "Split". The keyboard detaches into two halves, each anchored to a thumb-reach position on the left and right sides of the display. This is useful for:

• Two-thumb typing when holding the device with both hands
• One-handed typing with the keyboard anchored to the left or right (long-press split → Move Left/Right)

To re-merge: long-press the globe icon → tap "Merge" or "Dock and Merge".

The split keyboard is unique to the inner display — it does not work on the cover display because the screen is too small.

How do I use the floating keyboard on iPhone Duo?

Pinch inward with two fingers on the keyboard to detach it as a floating window. You can then drag the floating keyboard anywhere on the screen. To re-dock: pinch outward with two fingers, or drag the keyboard to the bottom of the screen.

The floating keyboard is useful when:

• Using Apple Pencil Pro in the upper half of the screen while typing in the lower half
• Reading a document and typing notes simultaneously
• Video calling with the keyboard floating over the video

The floating keyboard is a feature inherited from iPadOS and is now standard on iPhone Duo with iOS 27.

How do I use the trackpad on iPhone Duo?

Long-press anywhere on the keyboard → the keys disappear and the area becomes a trackpad. Move your finger to position the cursor; release to place it. The trackpad works on both the cover and inner display.

On the inner display, the trackpad is more precise because of the larger surface area. You can also use a two-finger trackpad gesture (long-press with one finger, then drag with another) for finer control.

iOS 27 also adds:

• Three-finger swipe left for undo
• Three-finger swipe right for redo
• Three-finger tap for the contextual menu (cut, copy, paste, look up)

What are the best iPhone Duo keyboard shortcuts?

iOS 27 brings the standard iPad keyboard shortcuts to iPhone Duo. The most useful:

Shortcut	Action
Cmd + Space	Quick search / Spotlight
Cmd + Tab	Switch between recent apps
Cmd + N	New document (Notes, Mail, etc.)
Cmd + F	Find in document
Cmd + C / V / X	Copy / paste / cut
Cmd + Z	Undo
Cmd + Shift + Z	Redo
Cmd + ,	App settings
Cmd + 1-9	Switch between tabs (Safari, Files)
Cmd + Shift + 3	Screenshot
Cmd + Shift + 4	Screenshot selection
Cmd + Shift + 5	Screen recording

For iPhone Duo power users, Cmd + Tab and Cmd + Space are the two most useful shortcuts. Cmd + Tab is essentially a task switcher that doesn't require lifting your thumb to the top of the screen.

Does iPhone Duo support external keyboards?

Yes — Bluetooth and USB-C external keyboards work with iPhone Duo. Pairing is the same as any other iPhone:

• Bluetooth: Settings → Bluetooth → pair keyboard
• USB-C: Plug into the Duo's USB-C port; works without additional drivers

External keyboards unlock the full shortcut bar (visible on the inner display) and turn the Duo into a near-laptop replacement when paired with a stand. Recommended external keyboards for the Duo:

• Apple Magic Keyboard (with Touch ID)
• Logitech MX Keys Mini
• Keychron K3 / K7 (low-profile mechanical)
• Brydge 12.9 MAX+ (when paired with the Duo's inner display, gives a laptop-like experience)

Does iPhone Duo support dictation?

Yes — iOS 27 dictation works identically on iPhone Duo. Tap the microphone icon on the keyboard, dictate, and iOS 27 transcribes in real time. Dictation supports 60+ languages and offline mode (after the first online download).

iOS 27 also adds:

• Punctuation commands ("comma", "period", "new line") for hands-free formatting
• Emoji commands ("smiley face emoji", "thumbs up emoji")
• Auto-language detection — start a sentence in English and switch to Spanish mid-stream

For long-form dictation (writing emails, notes, articles), the Duo's inner display provides a better visual feedback experience than the cover display.

How do I fix the iPhone Duo keyboard if it stops working?

Five common fixes:

1. Restart the Duo — Settings → General → Shut Down → wait 30 seconds → power on. Most keyboard glitches resolve on restart.
2. Check iOS 27 update — Settings → General → Software Update. Apple regularly ships keyboard bug fixes.
3. Reset keyboard dictionary — Settings → General → Transfer or Reset iPhone → Reset → Reset Keyboard Dictionary.
4. Toggle AirPlane Mode — Settings → Airplane Mode → on → wait 10 seconds → off. Resets the iCloud keyboard sync state.
5. Force-restart the Duo — Press and quickly release Volume Up, then Volume Down, then hold the Side button until the Apple logo appears.

If the issue persists, contact Apple Support or schedule a Genius Bar appointment. Persistent keyboard issues may indicate a hardware fault on the inner display digitizer.

Can I customize the iPhone Duo keyboard layout?

Limited customization — iOS 27 does not allow custom keyboard layouts on iPhone Duo. You can:

• Add third-party keyboards (SwiftKey, Grammarly, Gboard) from the App Store
• Toggle the numeric row on/off (Settings → General → Keyboard)
• Toggle the shortcut bar on/off (Settings → General → Keyboard)
• Switch between QWERTY, AZERTY, QWERTZ, and Dvorak layouts

For full layout customization (remap keys, custom shortcuts), jailbreak is required. Apple does not officially support custom layouts.

For more iOS 27 tips on iPhone Duo, see our iOS 27 features guide.