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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minute“Resize Outlook” can mean several different things. You may want to enlarge the Outlook window, make the text easier to read, zoom in on one email, or give the message list and Reading Pane more room. These controls are separate, so the right fix depends on what looks too small.
Use the section for your version of Outlook: new Outlook for Windows, classic Outlook for Windows, Outlook on the web, Outlook for Mac, or the mobile app.
Choose what you want to resize
| What looks wrong? | Use this setting |
|---|---|
| The whole Outlook window is too small | Resize or maximize the application window using Windows or macOS |
| Outlook and other apps have tiny text | Change Windows display scaling or the Mac display resolution |
| Only the email you are reading is too small | Use Outlook’s Reading Pane zoom or browser zoom |
| The sender and subject list is too small | Change message-list text settings |
| The list or Reading Pane has too little room | Change the Folder Pane or Reading Pane layout |
Resize the Outlook window in Windows
To change the physical size of the Outlook application window:
- If Outlook fills the screen, select the Restore Down button in the top-right corner. This is the button between the minimize and close buttons.
- Move the pointer to an edge or corner of the window until it changes to a two-sided arrow.
- Drag the edge or corner inward or outward.
- To make Outlook fill the screen again, select the Maximize button.
You can also use Windows Snap to arrange Outlook beside another application. Drag the Outlook title bar to the left or right edge of the screen, then release it. Windows will resize Outlook to occupy part of the display and offer other open windows for the remaining space.
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On Windows 11, press Windows + Z to open the Snap layouts menu, then select a layout. Snap is useful when you want Outlook and a browser, document, or spreadsheet visible at the same time.
Make Outlook larger with Windows display scaling
If the entire Outlook interface—including the folders, buttons, message list, and Reading Pane—is difficult to read, change Windows’ display scaling. This affects other applications too.
- Select Start > Settings > System > Display.
- Find Scale & layout.
- Open the Scale menu.
- Choose a larger percentage, preferably the option marked Recommended.
Display scaling increases the apparent size of text and interface elements without changing the monitor’s basic resolution. Avoid changing Display resolution just to enlarge text. A non-recommended resolution can make the screen look less sharp or cause windows and controls to fit poorly.
New Outlook for Windows
New Outlook has separate controls for the email body, message list, and Reading Pane layout. Select an email first when a procedure refers to the message currently being read.
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Zoom in on the email you are reading
- Select an email so it opens in the Reading Pane.
- Select View.
- Select Zoom.
- Use the + or − control to change the size.
- Select Reset to return to the default.
New Outlook supports a Reading Pane zoom range from 50% to 200%. This setting applies only to the email currently displayed. When you select another email, its body normally returns to the default zoom.
If Zoom is missing or unavailable, select a message first. The command may be disabled when no message is being displayed in the Reading Pane.
Enlarge the message list
This changes sender names, subject lines, and other text in the list—not the body of the selected email.
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- Select View > View settings.
- Select Mail > Layout.
- Under Text size and spacing, select Small, Medium, or Large.
- Select Save.
Give the Reading Pane more space
- Select View > View settings.
- Select Mail > Layout.
- Choose a Reading Pane position such as Right, Bottom, Fill screen, or Popout only.
Choose Right if you want the message list and message body visible side by side. Choose Bottom if you need wider subject lines. Fill screen gives the open email most of the available Outlook window.
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Classic Outlook for Windows
Classic Outlook usually has the traditional ribbon and a zoom control at the bottom of the window. Its settings differ from new Outlook.
Zoom the current email
With an email displayed in the Reading Pane, use the zoom slider in the bottom corner of the Outlook window. Drag it right to enlarge the message or left to reduce it.
To save a preference for messages opened in their own windows:
- Open the email in a separate window.
- On the ribbon, select Zoom. If it is not visible, select the More commands ellipsis at the right end of the ribbon and then select Zoom.
- Select the desired percentage.
- Select Remember my preference.
- Select OK.
The Reading Pane zoom normally affects the current item. If the zoom resets as you move between messages, use the standalone-message Zoom dialog and enable Remember my preference.
Increase message-list text
To enlarge sender names, subjects, column headings, and rows:
- Select Mail.
- Select View > View Settings.
- Select Other Settings.
- Select Column Font to change headings such as From and Subject.
- Select Row Font to change message subjects and rows.
- Choose a larger font size, select OK, and confirm the remaining dialogs.
If your view displays a preview line beneath the sender and subject, look for the Message Preview font setting as well. The exact options can vary with the Outlook view and version.
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Make room by changing the panes
The Folder Pane can take up a significant amount of horizontal space. In classic Outlook, select View > Folder Pane > Off to hide it. To restore it, select View > Folder Pane > Normal.
You can also select the Minimize the Folder Pane button at the top of the pane. This keeps quick access to folders while giving the message list and Reading Pane more room.
To move or hide the Reading Pane, select View, then in the Layout group select Reading Pane. Choose:
- Right for a side-by-side layout.
- Bottom for a wider message list.
- Off to hide the preview completely.
These view changes apply to the folder you are currently viewing. To use the same arrangement in other folders, select View > Change View > Apply Current View to Other Mail Folders.
Resize Outlook on the web or Outlook.com
Outlook on the web and Outlook.com do not use the same message-only Reading Pane zoom control found in classic Outlook. Use your browser’s page zoom to enlarge both the Outlook interface and email content.
Microsoft Edge
- Select Settings and more (…) in Edge.
- Find Zoom.
- Select + to enlarge the page or − to reduce it.
On Windows, the shortcuts are:
- Ctrl + + to zoom in
- Ctrl + − to zoom out
- Ctrl + 0 to reset the page zoom
Press F11 in Edge to enter or leave full-screen mode. Full-screen mode changes how much of the browser is visible; it does not increase the size of Outlook text by itself.
Google Chrome
Select More (…), then use the controls beside Zoom. The shortcuts are Ctrl + + and Ctrl + − on Windows and Linux, or Command + + and Command + − on Mac.
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To adjust the web layout itself, select Settings > Mail > Layout in Outlook. Depending on the interface, Reading Pane choices may include Right, Bottom, Fill screen, Popout only, or a hidden pane.
Outlook for Mac
Increase Outlook’s general text size
- In the macOS menu bar, select Outlook > Settings.
- Select Fonts.
- Move the text-display-size slider to the right.
This changes display text in areas such as the folder pane, message list, and Reading Pane.
Change the message preview font
- Select Outlook > Settings.
- Select Reading.
- Under Preview font for message, choose the font you want.
This is separate from the general Outlook display-size slider. Also, changing display preferences does not guarantee that every received HTML email will use the same formatting; messages can contain their own font and size instructions.
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- Place the cursor in the email body.
- Select Format > Zoom.
- Choose a percentage or enter a custom percentage.
Compose zoom changes how the draft appears on your screen. It does not permanently change the font size received by other people.
Make the entire Mac display larger
- Select Apple menu > System Settings.
- Select Displays.
- Choose a resolution such as Larger Text, where available.
This is a system-wide change and affects every application. At some scaled resolutions, windows may no longer fit completely on the screen.
Microsoft’s current documentation distinguishes current Outlook for Mac from legacy Outlook for Mac. Support for legacy Outlook for Mac ends in October 2026, so older menus may not match the steps above.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Outlook on Android and iPhone
The Outlook mobile app does not provide a desktop-style window-resize control. It generally follows the device’s text-size and display settings.
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On Android, Microsoft documents this path: Settings > Display and wallpaper > Font. Choose a larger font size, then reopen Outlook if the change is not immediately visible. On iPhone, use the device’s text-size or display settings; the exact menu names can vary by iOS version.
Common Outlook resizing problems
| Problem | What to do |
|---|---|
| The Zoom command is greyed out in new Outlook | Select an email so it appears in the Reading Pane. |
| Zoom disappears when you select another email | This is expected in new Outlook; its Reading Pane zoom is temporary for the current message. |
| The message body is larger but the message list is still tiny | Change message-list text separately using the new Outlook Layout settings or classic Outlook’s Row Font and Column Font controls. |
| The Folder Pane takes too much room | Minimize it or select View > Folder Pane > Off in classic Outlook. |
| Outlook.com is still too small | Increase the browser’s page zoom rather than looking for a classic Outlook Reading Pane zoom command. |
| Instructions do not match the screen | Check whether you are using new Outlook or classic Outlook. Their menus are different. |
What does not resize all of Outlook?
Ctrl + mouse wheel does not resize the whole Outlook application. In classic Outlook, it is associated with message-content or Reading Pane zoom. In Outlook on the web, browser zoom affects the web page.
Likewise, changing the zoom of one email does not permanently enlarge every email. New Outlook applies that Reading Pane adjustment only to the selected message. If you need larger controls throughout Outlook, use Windows scaling, Mac display settings, or the application’s message-list and font settings.
FAQ
How do I make the entire Outlook window bigger?
Restore Outlook if it is maximized, then drag an edge or corner of the window. Select the Maximize button to fill the screen. On Windows, you can also use Snap layouts with Windows + Z.
How do I permanently increase email text in new Outlook?
New Outlook’s View > Zoom control applies to the email currently being viewed and normally resets when you select another message. To make the interface larger, use View > View settings > Mail > Layout > Text size and spacing, or change Windows display scaling.
Why is Outlook Zoom disabled?
In new Outlook, select an email first so it is displayed in the Reading Pane. The Zoom command may be unavailable when no message is open or selected.
How do I enlarge the subject and sender list?
In new Outlook, select View > View settings > Mail > Layout and choose Large under Text size and spacing. In classic Outlook, use View > View Settings > Other Settings, then change Row Font or Column Font.
How do I enlarge Outlook.com email?
Use your browser’s zoom controls. In Edge, select Settings and more (…) > Zoom, or press Ctrl + Plus on Windows. In Chrome, select More (…) > Zoom.
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The mobile app does not have a desktop-style window-resize control. Increase the device’s font or display size instead. On Android, Microsoft documents Settings > Display and wallpaper > Font.
The Bottom Line
For a larger Outlook window, resize or maximize the application. For larger text everywhere, change Windows scaling or macOS display settings. For a larger email, use the appropriate Reading Pane or browser zoom. If the message list or panes are the problem, adjust Outlook’s layout separately—one zoom setting does not control every part of the app.
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