How To Increase Font Size In Outlook

Tired of squinting at tiny email text in Outlook? This guide walks you through every method to increase font size, from quick toolbar changes to Windows display settings that make the whole app easier to read.

Fast Answer

Quickest fix: Use the Zoom slider in the bottom-right corner of any Outlook window to enlarge text immediately.

5–10 minutes Time needed

Beginner-friendly Difficulty

Default zoom resets Watch out for

Before You Start

Access to Microsoft Outlook on Windows, Mac, or the web version (Outlook.com).
At least 5 minutes of uninterrupted time to adjust settings and test changes.
A test email or draft open so you can check readability as you make adjustments.

Check first: Changes to the reading pane font size affect how emails are displayed to you only. Recipients will not see your enlarged font; their view depends on their own settings.

Step-by-Step Instructions

Use the Zoom Slider for Instant Readability

Open Outlook and look at the bottom-right corner of the main window. You will see a horizontal slider with a minus sign on the left and a plus sign on the right. Drag the slider toward the plus sign to increase the zoom level.

Alternatively, press Ctrl and the plus key on Windows, or Command and the plus key on a Mac. Each press increases the zoom by 10 percent. Keep pressing until the text reaches a comfortable size.

Tip: Zoom levels range from 10 to 400 percent. Set it around 125 to 150 percent for a noticeable improvement without excessive scrolling.

Adjust the Reading Pane Font Size

Click the File tab in the top-left corner, then select Options from the left-hand menu. In the Outlook Options window, click Mail, then scroll down to the Compose messages section.

Click the Stationery and Fonts button. A new window will open with three font buttons: New mail messages, Replying or forwarding messages, and Composing and reading plain text messages. Click each one and change the font size to your preference, then click OK to save.

Caution: Changing these settings affects all new emails you compose, reply to, or forward. It does not change how incoming messages from other people appear.

Change the Default Font for New Emails You Write

If you want every email you send to use a larger font by default, go back to the Stationery and Fonts window you opened in the previous step. Click the New mail messages button, and in the Font dialog box, choose a font size between 12 and 14 points for comfortable reading.

Select a font style you like, such as Calibri or Arial, then click OK. Repeat this for the other two buttons if you want consistency across all message types.

Tip: A 12-point font is a safe default. Go to 14 if you regularly read on a high-resolution screen where text appears smaller.

Zoom In on the Reading Pane Only

When viewing an email, click anywhere inside the reading pane. Hold down the Ctrl key on Windows or Command on Mac, and scroll up with your mouse wheel. The email text will enlarge while the folder list stays the same size.

This method is temporary and only applies to the email you are currently viewing. When you click a different email, the zoom resets to the default level.

Note: You can also use the Zoom button on the View tab and choose a percentage from the dropdown. Pick 100 percent or higher for instant adjustment.

Increase Font Size in the Folder Pane and Message List

Open File, then Options, and click General. Look for the section that says Personalize your copy of Microsoft Office. At the bottom, you will see a setting for Office Theme.

Change the theme dropdown selection to control overall appearance. Then open the Display section and click the button that says Display Options. From here, you can adjust the font size for the folder pane and message list, making navigation easier.

Tip: If you use Outlook on Windows, also check your Windows display scaling. Right-click your desktop and select Display settings, then increase the scale percentage to 125 or 150 percent for system-wide text enlargement.

Use Windows Display Settings for a Wider Impact

If Outlook text is still too small after adjusting the app settings, change the operating system scaling. Right-click an empty area of your desktop and choose Display settings.

Under the Scale and layout section, select 125% or 150% from the dropdown menu. This enlarges all text and icons across Windows, including Outlook, making everything easier to see.

Check first: Increasing Windows scaling affects all applications, not just Outlook. Some programs and websites may display slightly less content on screen as a result. Log out and back in if Windows does not apply the change immediately.

Change Font Size in Outlook on the Web

Open Outlook.com in your browser and sign in. Click the gear icon in the top-right corner to open settings. Scroll down and choose View all Outlook settings.

Select Mail, then Compose and reply. Scroll to Message format and adjust the font size for new messages. For reading existing emails, use your browser zoom with Ctrl and the plus key to enlarge everything on the page.

Tip: Browser zoom also works if you prefer to keep Outlook settings unchanged. It affects only the current tab and resets when you close that tab.

Make Permanent Changes to Reading Pane Font

If you want incoming email text to appear larger, click File, then Options, then Mail. Under Compose messages, click Stationery and Fonts again.

Click the Reading plain text messages button and select a font size larger than the default 10 points. Choose 12 or 13 points for improved readability. Click OK to save, then restart Outlook to apply the change.

Important: This only applies to plain text emails. Rich-text emails from other senders use whatever font they chose when composing. There is no way to force incoming HTML emails to use a bigger font.

Use Keyboard Shortcuts for Quick Adjustments

Outlook supports keyboard shortcuts that let you change font size without opening menus. Select any text in an email you are composing, then press Ctrl and Shift and the greater-than sign to increase the font size by one step.

Press Ctrl and Shift and the less-than sign to decrease the size. Hold the keys down to cycle through multiple size increments quickly.

Tip: These shortcuts work in the compose window and in the body of replies. Memorise them to save time when you need to adjust individual sections of text.

Quick Reference

Situation	Use this	Why
Reading an email right now	Zoom slider or Ctrl plus key	Instant, no permanent changes
All new emails I compose	Stationery and Fonts settings	Sets a permanent default font size
Whole Outlook app is too small	Windows display scaling	Enlarges every part of the interface
Incoming plain text emails	Reading plain text messages font	Applies to all plain text messages
Using Outlook in a browser	Browser zoom controls	Simplest way to enlarge everything

FAQ

Common Issues

If the result is not working as expected, return to the previous step, check the material or setting involved, and make one adjustment at a time for how to increase font size in outlook.

Advanced Tips

Once the basics are consistent, change only one variable at a time and keep notes on what improves the result for how to increase font size in outlook.

Final Checklist

Confirm the key measurement or setting.
Check the result in normal daily use.
Store the care notes for the next time.

What should I check before using this advice?

Check the current details that apply to how to increase font size in outlook, including availability, local rules, timing, compatibility, and any personal constraints.

Who is this guidance best for?

It is written for readers who want a practical starting point and are prepared to compare the advice with their own situation before acting.

What is the simplest next step?

Start with the first low-risk action, check the result, and make one adjustment at a time rather than changing several things at once.